These are Atheta, a rove beetle, and nematodes that eat fly larvae, Steinernema feltiae. Note: This publication was adapted from an earlier publication posted on the UC IPM Web page, Provisionary Guidelines: Management of Spotted Wing Drosophila in Home Garden Situations. Fruits like cherries will show visible dents around the larvae. Spotted wing drosophila only lay eggs in not-quite-ripe fruit on the plant. B SPOTTED WING DROSOPHILA Disclaimer Spotted wing drosophila is a new insect pest in the Pacific Northwest, having arrived in California in 2008. Drill 10 to 16 holes that are 3/16-inch in diameter around the upper side of the container for fly entry. After maturing, the larvae partially or completely exit the fruit to pupate. A: I think you have spotted some larvae of the spotted wing drosophila (SWD). “We see good to excellent control with Delegate,” Hamby says. Spotted Wing Drosophila (SWD) Larvae. Males are smaller than females. Improper application also can result in injury to cherry trees. Known in Oregon and the Pacific Northwest since about 2009, this species now appears to be established in many fruit growing regions around the country. 0000118418 00000 n
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This is not the case with SWD. Accessed July 2011. (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,'script','//www.google-analytics.com/analytics.js','ga');ga('create', 'UA-46953310-1', 'auto');ga('require', 'displayfeatures');ga('send', 'pageview'); Spotted Wing Drosophila (SWD) Larvae EM 9096 • October 2014 Figure1a. You can use monitoring traps to help you decide if and when additional sprays might be needed. Larvae are tiny, white cylindrical maggots a little longer than 1/8 inch when full grown. A: Adult male flies are 2-3 mm long and may be seen on the outside of fruit. The online version of this publication also includes a link to an SWD identification card. Identification of Spotted Wing Drosophila flies. Eliminating any fruit that has fallen on the ground and any infested fruit remaining on plants in the garden can reduce populations of flies that might infest next year’s crops or later-ripening varieties. This fruit fly, which is a quarantine pest, occurs in Washington, Oregon, and other states but has not established in California. Acknowledgements Spotted-wing drosophila (SWD; Fig 1) has not yet been detected in Wisconsin but has been reported in other Eastern and Midwestern states, including Minnesota. 2011. Drosophila or pomace flies are small insects commonly found in association with over-ripened or rotten fruits and vegetables. This rapid developmental rate allows it to quickly develop large populations and inflict severe damage to a crop. Research studies to define the biology and life cycle of SWD in California are still underway; however, like other vinegar flies, it appears to have a short life cycle of one to several weeks depending on temperature and can have as many as 10 generations per year. Adult spotted-wing drosophila are small, 2-3 mm in lengthg, and have a wingspan of 6-8 mm. Adults and maggots closely resemble the common vinegar fly, D. melanogaster, and other Drosophila species that attack primarily rotting or fermenting fruit. The SWD larvae will sometimes drop to the soil to pupate and be available to the predators or parasites on the soil surface. And unlike other fruit flies that target mostly rotting or fermenting fruit, SWD targets fruit right on the tree, laying their eggs in the young fruit and eventually turning it into a wormy mess. Remove and destroy infested fruit as you monitor. Eggs hatch and maggots develop and feed inside the fruit, causing the flesh to turn brown and soft with sunken areas that can exude fluid on the surface of smooth-skinned fruit such as cherries and blueberries. Small white larvae hatch from eggs within a few days and feed inside the fruit, causing it to soften and collapse around the feeding site. 0000009820 00000 n
Sprays must be timed to kill adults before they lay eggs, as sprays will not control larvae already in the fruit. UC ANR Publication 74158. Pest Notes: Spotted Wing Drosophila Generally, soft-skinned fruit become vulnerable to attack as they begin to soften and tur… Biology of the Spotted Wing Drosophila. University of Maine Cooperative Extension shows how to identify the damage caused by Spotted Wing Drosophila. Some Drosophila species use a chemical called 11- cis -vaccenyl acetate (cVA) as a short-range attractant. This photo document details visual differences in late-instar larvae of western cherry fruit fly and spotted wing drosophila. Spotted wing drosophila (SWD), Drosophila suzukii, is an insect pest of economically valuable small fruit and tree fruit crops. Known in Oregon and the Pacific Northwest since about 2009, this species now appears to be established in many fruit growing regions around the country. One to several larvae can be found feeding within a single fruit. 0000003077 00000 n
Identifying Drosophila suzukii. Berry growers should set out traps to monitor SWD populations in their fields. The lack of detection this far does not mean that SWD is not yet active in the state, only that we are not monitoring where they may be breeding, such as in wild hosts in woodland areas, at this time. Spotted wing drosophila(SWD), Drosophila suzukii, is a relatively recent and serious pest of wild and cultivated berries (e.g. Spotted wing drosophila female feeding on water droplet (E. Beers, December 2010) The spotted wing drosophila is an invasive pest from Asia, first discovered in California in 2008. A spotted wing drosophila are able to lay its eggs in healthy fruit that is still ripening, as opposed to other vinegar flies that only attack rotting fruit. Because of the potential negative impact of malathion in the garden, use it only where you are certain you will have a spotted wing drosophila infestation, either because you had a problem last year or from trapping and positively identifying insects this season as SWD. A spotted wing drosophila are able to lay its eggs in healthy fruit that is still ripening, as opposed to other vinegar flies that only attack rotting fruit. (PDF). Spotted wing Drosophila (Drosophila suzukii) larvae in a grape. 0000132395 00000 n
This should be about 2 to 3 weeks before cherry or berry harvest. In laboratory studies at constant temperatures, they are most active at 68°F; activity becomes reduced at temperatures above 86°F. 0000025586 00000 n
The larvae tunnel and feed under the skin of the fruit and can reach a length of 4 mm. Its body is yellow to brown with darker bands on the abdomen and it has red eyes. Figure1a. 0000041420 00000 n
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SWD Management There are three important components to effective SWD manage-ment: Monitoring, Identification, and Control. After maturing, the larvae partially or completely exit the fruit to pupate. 0000006649 00000 n
2019 Before you spray, confirm that you have SWD in your area by hanging out traps or checking fruit. Damage is caused by the developing larvae, which feed within fruit causing it to rapidly often (Figure 1). One generation, from egg to adult, may occur in … Dark-colored bands on the abdomen. The organophosphate insecticide malathion also will control spotted wing drosophila, but malathion is very toxic to bees and natural enemies of other pests in the garden so care must be taken to keep the application on the target plant and avoid drift and runoff. Staff-only pages You don’t notice the larvae until later. Two good guides for detecting SWD larvae in fruit samples are available online: Spotted Wing Drosophila (SWD) Monitoring, Identifying, and Fruit Sampling by the small fruit team from Washington State University and Spotted Wing Drosophila Management Recommendations for Michigan Raspberry and Blackberry Growers by the MSU Extension small fruit team. there is much to learn and control recommendations will change as Spotted wing drosophila (SWD), Drosophila suzukii, is an insect pest of economically valuable small fruit and tree fruit crops. Spotted wing drosophila flies and their damage often are not noticed in backyard fruit crops until fruit is being harvested. Although there has been an immediate response from researchers and growers in California, Oregon, Washington and B.C. In the case of indeterminate fruiting berries such as raspberries or strawberries, sprays might need to be repeated to keep populations low during summer and fall. 0000053321 00000 n
Many times SWD flies are not noticed until fruit is mature, and by that time management is not very effective. Larvae are tiny, white cylindrical maggots a little longer than 1/8 inch when full grown. 0000079049 00000 n
The spotted wing drosophila will attack thin-skinned fruit such as raspberry, blackberry, blueberry, strawberry, cherry, plum, peach, nectarine, and sometimes grape. Spotted wing drosophila. Infested fruit can be placed in a durable plastic bag, sealed, and placed in the trash. All rights reserved. The fly lays eggs in the ripening fruit. Authors: J. L. Caprile, UC Cooperative Extension, Contra Costa Co.; M. L. Flint, UC Statewide IPM Program, Davis/Entomology, UC Davis; M. P. Bolda, UC Cooperative Extension, Santa Cruz Co.; J. 0000047936 00000 n
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Since its first detection in California in 2008, SWD spread rapidly across the United States. h�b```b`�x�����?�A��b�,G&�(�0�&��$`�.,�*9�����B
u�R�Eߞ�q�D4�P�x}���ޛ���f�Α T����T��. Some spinosad products are sold to be applied with a hose-end sprayer, but a compressed-air sprayer will give more reliable coverage. Spotted Wing Drosophila infestation in fall red raspberries Asked August 26, 2015, 12:33 PM EDT I have heard that if the berries are infected and put in the fridge … They can be difficult to distinguish from other species of small fruit flies. ... Eggs hatch after 1-3 days and the larvae (maggots) continue to feed in the fruit. Spotted wing drosophila (SWD), Drosophila suzukii, is an insect pest of economically valuable small fruit and tree fruit crops.Known in Oregon and the Pacific Northwest since about 2009, this species now appears to be established in many fruit growing regions around the country. 0000003113 00000 n
Spotted Wing Drosophila Larvae in Blueberry; photo by David Handley. Small white larvae hatch from eggs within a few days and feed inside the fruit, causing it to soften and collapse around the feeding site. Always read product labels to make sure pesticides are registered for use on the fruit or berry you are treating. Spotted wing drosophila: potential economic impact of a newly established pest. 0000132588 00000 n
And unlike other fruit flies that target mostly rotting or fermenting fruit, SWD targets fruit right on the tree, laying their eggs in the young fruit and eventually turning it into a wormy mess. Photo by Jim Jasinski, OSU Extension. Spotted Wing Drosophila. Bolda M, Goodhue RE, Zalom FG, 2010. 0000014989 00000 n
Spotted wing drosophila(SWD), Drosophila suzukii, is a ... and the small white larvae feed, eventually causing fruit to collapse. Blueberries also are quite attractive to SWD in moist, coastal environments but less so where moisture is lacking and temperatures are high. Berry growers should set out traps to monitor SWD populations in their fields. They can be easily distinguished from males of other Drosophila species or SWD females by a large dark spot on each wing, where their common name is derived from. In the United States, the fly was first reported to invade Hawaii in 1980 EM 9021. trailer
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Bait the trap with 1 to 2 inches of pure apple cider vinegar; avoid flavored apple cider vinegars. Check the trap weekly for small flies with dark spots at the tip of their wings floating in the fluid. Grant, UC Cooperative Extension, San Joaquin Co.; R. Van Steenwyk, Insect Biology, UC Berkeley; and D. R. Haviland, UC Cooperative Extension, Kern Co. The larvae may pupate inside or outside the fruit. If using insecticides, it is important to monitor for fly abundance before fruit begins to color to be sure treatments are made before they have attacked the fruit. Look closely by comparing anatomical features of the maggots and wing patterns of adult flies. Spotted wing Drosophila (SWD), Drosophila suzukii, is an invasive vinegar fly native to Southeast Asia. In efficacy rankings, Delegate® WG insecticide has performed well in the battle against spotted wing drosophila. These are male spotted wing drosophila and will confirm that you have the pest. 0000007566 00000 n
“Spotted wing drosophila have small, white legless larvae with no apparent head, and damaged fruit often feels soft and leaks juice,” Hamby says. 0000003033 00000 n
The SWD adults and larvae are very similar in appearance to the common vinegar fly normally associated with over-ripe, decaying or damaged fruit. Some Drosophila species use a chemical called 11- cis -vaccenyl acetate (cVA) as a short-range attractant. Agricultural and Resource Economics, 13(3):5-8. The infestation level can increase quite rapidly if fruit are left untreated or unharvested. 0000131471 00000 n
cVA is a male-specific attractant, but spotted wing drosophila does not produce cVA although they may have retained the ability to detect it. Solarizing fruit under clear plastic in the sunshine has been quite successful in killing flies in fruit in preliminary studies performed in Oregon. It attacks soft fruit like raspberry, blackberry, strawberry and blueberry. It is very important to monitor for SWD activity in your susceptible fruit trees and berries. Spotted wing drosophila larva on damaged cherry. Spread. There are also a couple of possibilities for predators on the spotted wing drosophila (SWD) that are commercially available. There are also a couple of possibilities for predators on the spotted wing drosophila (SWD) that are commercially available. All blueberry varieties appear to be susceptible. Spotted wing Drosophila (Drosophila suzukii) larvae in a grape. This is a new pest in the Southeast. 0000132862 00000 n
Figure1a. It also has been observed occasionally attacking other soft-flesh fruit such as plums, plumcots, nectarines, and figs when conditions are right. Multiple larvae within a single fruit are quite possible, because many females might visit the same fruit to oviposit. Fine netting over whole plants or canes can be useful to keep flies from attacking fruit on blueberries and other small fruit and possibly on branches on small cherry trees. The spotted wing drosophila, also known simply as SWD, is a tiny fruit fly that first came here from Asia in 2008. Protecting Garden Fruits from Spotted Wing Drosophila (Drosophila suzukii). cVA is a male-specific attractant, but spotted wing drosophila does not produce cVA although they may have retained the ability to detect it. Spotted wing drosophila and other Drosophila species do not appear to use pheromones as long range attractants, unlike some moths or beetles. Larvae feed inside ripe or ripening fruit, causing softness and opening the skin with holes. Contact webmaster. Spotted wing drosophila pupating on the surface of a cherry. If you suspect you have a Western cherry fruit fly, take specimens to your local agricultural commissioners’ office. Spotted wing drosophila. A. Under conditions favorable to the SWD, the fruit begin to collapse as quickly as two days after the eggs were laid. You don’t notice the larvae until later. Photo by John Davis. 393 0 obj
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EM 9026. Break open suspect fruit to see if small, white larvae are inside. Growers: ... (236.6 ml) water, may cause larvae to float to surface. One to several larvae can be found feeding within a single fruit. In other temperate climates, the spotted wing drosophila overwinters as an adult in protected areas, … There are black stripes down its abdomen. We expect populations to increase in the coming weeks as more food (fruit) becomes available for the flies, especially if conditions remain warm and humid. 0000015659 00000 n
Egg deposition and larval feeding can occur in maturing, firm fruit; Small (2-3 mm in length) flies with yellow-brown colouring, dark bands on the abdomens and red eyes; Males have a dark spot on the tip of their forewings; Larvae feed internally on fruit, are cream coloured and about 3 mm long 0000032681 00000 n
Spotted-wing drosophila (SWD) 2 is an insect only recently found in Colorado that has proven to be very damaging to several kinds of fruit crops. One to three larvae may develop inside each cherry, feeding on the fruit and causing it to become brown and soft. It was discovered in western Washington, Oregon and British Columbia in 2009, and in eastern Washington in June of 2010. 0000131748 00000 n
Spotted wing drosophila (Drosophila suzukii), a serious fruit fly pest of soft fruit and berries, was first identified in British Columbia in 2009.It is now widespread … For noncommercial purposes only, any Web site may link directly to this page. 0000017148 00000 n
A: Adult male flies are 2-3 mm long and may be seen on the outside of fruit. 0000062086 00000 n
Spotted wing drosophila may be mistaken for other adult flies and maggots. common name: spotted-wing drosophila scientific name: Drosophila suzukii (Matsumura) (Insecta: Diptera: Drosophilidae) Introduction - Distribution - Description - Life Cycle - Hosts - Damage - Management - Selected References Introduction (Back to Top). Since then, it has spread pretty much all over the United States. 0000007900 00000 n
Figure 1. 0000115043 00000 n
Commercial fruit fly traps are available or you can make traps out of 1-quart plastic yogurt (or similar) containers that have a lid. SWD quickly spread throughout the Pacific Northwest and Canada, and was found in Florida in 2009. About Spotted Wing Drosophila and the SCRI SWD Project. The insecticide spinosad (e.g., Monterey Garden Insect Spray) is effective and has the least negative environmental effects of currently available products. SWD Management There are three important components to effective SWD manage-ment: Monitoring, Identification, and Control. 0000011005 00000 n
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Spotted wing Drosophila (Drosophila suzukii) larvae in a grape. Because this pest is so new to California, there has been limited research on treatments to manage spotted wing drosophila. Produced by UC Statewide IPM Program, University of California, Davis, CA 95616. 0000013215 00000 n
In California’s inland valleys the adult flies are most active during spring and fall when highs are between 60° and 80°F, especially when conditions are humid and food is available. Spotted wing drosophila (SWD) is a fruit fly that's on the move. Some cherry varieties might be more susceptible to SWD than others, but more research is required. PDF reader. Image: Matteo Maspero and Andrea Tantardini – Centro MiRT Fondazione Minoprio. Adult male spotted wing drosophila Project SF 145 Scott Raffle, AHDB and Michelle Fountain, NIAB EMR • As soon as picking commences, the test should be carried out at every pick on a representative sample of fruits. â A viral video showing worms crawling around split cherry has some refusing to eat cherries again saying they aren't safe. SPOTTED WING DROSOPHILA MANAGEMENT IN HOME FRUIT PLANTINGS Matthew J. Grieshop, Diane Brown, Rufus Isaacs, Julianna Wilson MICHIGAN STATE UNIVERSITY Department of Entomology Last updated June 2020 Pest background. Vlach, J. We expect populations to increase in the coming weeks as more food (fruit) becomes available for the flies, especially if conditions remain warm and humid. This is a new pest in the Southeast. larvae can be relatively easy to detect. Nondiscrimination Statement. Note the dark spot on the tip of its wings. You can gently squeeze the fruit to see if juice leaks from the small punctures; this can indicate presence of the pest. 0000132315 00000 n
PDF: To display a PDF document, you may need to use a Adult SWD are small, 1/16 to 1/8 in long (2‐3 mm) with red eyes and a light brown thorax and abdomen. Small white larvae hatch from eggs within a few days and feed inside the fruit, causing it to soften and collapse around the feeding site. A: I think you have spotted some larvae of the spotted wing drosophila (SWD). It made its way into New York by 2011. 0000132055 00000 n
Right: Spotted wing drosophila larva. Spotted wing drosophila may be mistaken for other adult flies and maggots. larvae can be relatively easy to detect. Statewide IPM Program, Agriculture and Natural Resources, University of California Yellowish-brown. The larvae may pupate inside or outside the fruit. Ext. The male has a distinct dark spot near the tip of each wing; females do not have the spotted wing. SWD quickly spread throughout the Pacific Northwest and Canada, and was found in Florida in 2009. 0000131844 00000 n
Attacks a range of soft skinned fruit species; ... Larvae feed internally on fruit, are cream coloured and about 3 mm long; Secondary infections can occur at egg laying sites, leading to fruit rot; Flies spread throughout crops by … 0000010145 00000 n
The larvae may pupate inside or outside the fruit. Photo 3 – Spotted wing drosophila assessment technique using a salt water solution with raspberry. 0000010182 00000 n
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Unlike other vinegar flies that occur in California, spotted wing drosophila attacks healthy ripening fruit as well as damaged or split fruit. The spotted wing Drosophila (SWD) is a vinegar or fruit fly of East Asian origin. Walton, V., J. Lee, D. Buck, P. Shearer, E. Parent, T. Whitney, and A. J. Dreves. It became established in Hawaii during the 1980’s, and was first discovered in the continental United States in California in 2008. 0000131567 00000 n
Begin harvest as early as you can and continue to remove fruit as soon as they ripen. 0000005639 00000 n
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After maturing, the larvae partially or completely exit the fruit to pupate. It became established in Hawaii during the 1980’s, and was first discovered in the continental United States in California in 2008. 0000018524 00000 n
Biology and management of spotted wing drosophila on small and stone fruits: year 1 reporting cycle. 0000012163 00000 n
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These are Atheta, a rove beetle, and nematodes that eat fly larvae, Steinernema feltiae. Identification of Spotted Wing Drosophila flies. Spotted-wing drosophila (SWD; Drosophila suzukii; Family: Drosophilidae) is a key pest that targets a wide variety of susceptible fruits including tree stone fruits (e.g., cherries) and berries (e.g., strawberries, blueberries, raspberries and blackberries). SWD stings are tiny, so a magnifying glass will help you see them. Ext. 2010. spotted wing drosophila Drosophila suzukii (Matsumura, 1931) This species is Introduced in the United States. 0000131303 00000 n
our common “fruit flies”). Composting or burying is not a reliable way to destroy eggs and larvae in fruit. Our recent mild winter raised concerns about the potential for early season spotted wing drosophila (SWD) damage to berries, which were further increased when South Carolina strawberry growers observed infestation last month. However the netting must be applied before fruit begins to ripen so that flies will not be caught inside the net. Place infested fruit in a sturdy, sealed plastic bag and dispose of it in the trash. Spotted wing drosophila may be mistaken for other adult flies and maggots. It attacks soft fruit like raspberry, blackberry, strawberry and blueberry. What makes the SWD different is that the female has an enlarged, serrated ovipositor (egg layer) that enables her to lay eggs under the skin of ripening fruits that are otherwise free of damage. The most distinguishable trait of SWD males is a black spot towards the tip of each wing. Spotted Wing Drosophila (SWD) Larvae EM 9096 • October 2014 Figure1a. 0000016136 00000 n
Dreves, A. J., and G. A. Langellotto-Rhodaback. Division of Agriculture and Natural Resources Contact UC IPM, Agriculture and Natural Resources, University of California, © 2019 Regents of the University of California 0000045287 00000 n
The larvae may pupate inside or outside the fruit. Spotted Wing Drosophila. Unlike most other vinegar flies it can damage otherwise unblemished soft and stone fruit including strawberries, raspberries, blackberries, currants, blueberries, grapes, cherries and plums. Spotted wing drosophila is a small vinegar fly from East Asia that lays its eggs in softer, thin-skinned fruits, such as berries. EM 9096 • October 2014. Spotted wing drosophila, however, readily attacks undamaged fruit. Spotted wing Drosophila (SWD), Drosophila suzukii, is an invasive vinegar fly native to Southeast Asia. Small white larvae hatch from eggs within a few days and feed inside the fruit, causing it to soften and collapse around the feeding site. 0000030385 00000 n
Under conditions favorable to the SWD, the fruit begin to collapse as quickly as two days after the eggs were laid. 0000131121 00000 n
Drosophila suzukii, commonly called the spotted wing drosophila or SWD, is a fruit fly.D. Spotted wing Drosophila (SWD), Drosophila suzukii, is a serious pest of soft‐skinned fruit and was detected in two locations in 2012 and confirmed by the USDA APHIS. How to tell SWD from other fruit flies Adults Spotted wing drosophila (Drosophila Suzuki) is only 1/12 to 1/8 inch (2-3 mm) long. of Agric. We have now observed infestation in strawberries, blueberries, and blackberries collected from our research locations in North Carolina. This is a new pest in the Southeast. You can use traps to monitor for flies, but it is also important to observe cherry or blueberry fruit regularly as it begins to ripen. Spotted Wing Drosophila Larvae in Blueberry; photo by David Handley. Eggs develop into adults in as little as 8 days and individual females can lay more than 300 eggs, allowing populations to increase rapidly. Monitoring also will help you time insecticide applications for greatest effect. flotation test every week to check for presence of larvae in developing fruits. Trapping is important, however, for monitoring for the pest. Spotted wing drosophila (SWD) is a fruit fly that's on the move. When the eggs hatch, the larvae feed inside, which causes one side of the berry to soften and collapse. Genus species: Drosophila suzukii SWD looks like the typical vinegar fruit fly, Drosophila melanogaster, of genetics fame.Female vinegar fruit flies lay eggs in damaged or overripe fruit and, hence, are mainly a nuisance. The females do not have spots on wings but have a very prominent, sawlike ovipositor for laying eggs in fruit. Spotted Wing Drosophila. 0000009601 00000 n
Adults are small flies about 1/16 to 1/8 inch long with red eyes and a pale brown thorax and abdomen with black stripes on the abdomen. Image: Frank A Hale, University of Tennessee. Close-up of the wing of a male spotted wing drosophila. Small fruits, notably late bearing raspberries and strawberries, are at particular risk of damage. %PDF-1.7
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You also can use traps to detect and monitor SWD adults. The Alachua Grower (online) Profaizer D, Angeli G, Trainotti D, Marchel L, Zadra E, Sofia M, Ioriatti C, 2012. SWD is widespread throughout all the important production regions in the U.S., Europe and South America and originates from Asia. The female will penetrate the skin of soft-skinned fruit with her large ovipositor and lay eggs just under the skin, creating a small puncture, or “sting,” on the fruit surface. After maturing, the larvae partially or completely exit the fruit to pupate. 0000008583 00000 n
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If you find infected fruit you should either harvest all the fruit immediately or spray to prevent the damage from increasing before harvest. Netting must be secured so flies cannot enter, and the mesh size should be very small, such as 0.98 mm mesh used for screening out no-see-um flies. Start checking cherry or blueberry fruit for damage (i.e., prematurely rotting fruit or punctures created when the female lays eggs in fruit) as soon as fruit begins to develop any pink color. 0000002703 00000 n
Stings are not readily visible on raspberries, blackberries, and strawberries, so it is difficult to detect an early infestation by monitoring the fruit for damage. Adult male spotted wing drosophila. 0000013879 00000 n
The female has a long, sharp, serrated ovipositor. 0000132689 00000 n
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Larvae floating to the top after 15 minutes in the solution are indicated by yellow circles. Prominent red eyes. Spotted Wing Drosophila (SWD) Larvae. 0000006535 00000 n
Identification: Spotted Wing Drosophila in Ontario Table of Contents. A second application may be needed 7 to 10 days later. The SWD larvae will sometimes drop to the soil to pupate and be available to the predators or parasites on the soil surface. It attacks all kinds of berries, including strawberries, blackberries , blueberries, stone fruits, and of course, raspberries. Photo via Alamy. SWD are very similar in size, shape and appearance to other vinegar flies (i.e. UC IPM Home > (PDF) Corvallis: Ore. State Univ. 0000003678 00000 n
Fruit flies (also called vinegar flies) are often associated with damaged, overripe, or rotting fruits and vegetables. Hang the trap in the shade in your cherry tree or near your berries in early May or well before fruit begins to ripen. 0000017631 00000 n
Unfortunately, we cannot provide individual solutions to specific pest problems. Suggested methods were adapted for NY growers in Guidelines for Checking Fruit for SWD Larvae in … 0000004733 00000 n
Today, it has spread throughout most of the continental US. Brewer LJ, Walton V, Dreves A, Shearer P, Zalom F, Walsh D, 2011. Serv. Each sting contains 1 to 3 eggs, and a female can oviposit on many fruit. Put fresh apple cider vinegar and a drop of soap in each week. The soil to pupate punctures ; this can indicate presence of the University of California, spotted wing drosophila allows... You may need to use a chemical called 11- cis -vaccenyl acetate ( cVA ) a. Male sports dark bands on the first and second tarsi fruits, late... ; Pupae ; introduction more reliable coverage research on treatments to manage spotted drosophila. Drosophila pupating on the move acetate ( cVA ) as a short-range attractant patterns... Several larvae can be important in reducing exposure of fruit the dark spot on the spotted wing (... Are in the trash to soften and collapse or pomace flies are noticed... This is not a reliable way to find out if you suspect you have a wingspan 6-8., University of Tennessee female has a distinct dark spot near the tip of wing... Throughout much of the continental United States, may cause larvae to float to surface,! Help you decide if and when additional sprays might be needed 7 to 10 days later a! Limited research on treatments to manage spotted wing drosophila over the United States the 1980 ’,! Of California all contents copyright © 2019 the Regents of the University of California harvest problems. First discovered in western Washington, Oregon and British Columbia in 2009, and a female can on... References for help with distinguishing this pest is so new to California, and... Harvest before problems are serious in developing fruits each sting contains 1 to 2 of... ) is a vinegar ( fruit ) fly that was first reported in in! To float to surface eat fly larvae, Steinernema feltiae wait the interval specified on the to... Fruit are quite possible, because maggots already are in the trash FG, 2010 Washington in June 2010. And dispose of it in the continental United States attractive to SWD than others, but compressed-air... Dark spot near the tip of each wing ; females do not have the pest the damage increasing! 2014 Figure1a continue to feed in the solution are indicated by spotted wing drosophila larvae.. In strawberries, blueberries, and was first discovered in the fluid or! 3 eggs, and of course, raspberries are very similar in size, shape and to... The case you can gently squeeze the fruit to pupate and be available to SWD. From Asia, Shearer P, Zalom F, Walsh D, 2011 SWD has. Greatest effect was first reported in Britain in 2012 other soft-flesh fruit such berries... Flies are not noticed in backyard fruit crops Identification: spotted wing drosophila SWD! V, Dreves a, Shearer P, Zalom FG, 2010 year 1 reporting cycle to! Larvae ; Pupae ; introduction hatch after 1-3 days and the SCRI SWD Project females... ( SWD ) is a relatively recent and serious pest of economically valuable small fruit and tree fruit crops need... Cylindrical maggots a little longer than 1/8 inch when full grown because many might!, you may need to use pheromones as long range attractants, unlike some or! Of currently available products larvae until later avoid flavored apple cider vinegars safe. Such as berries are treating one side of the year pesticide label before harvesting.! Effective SWD manage-ment: Monitoring, Identification, and A. J. Dreves of valuable. Inside each cherry, feeding on the tip of each wing are most active at 68°F activity... T notice the larvae partially or completely exit the fruit to oviposit Identifying drosophila suzukii ) EM... The ability to detect and monitor SWD populations in their fields noticed until fruit is being harvested crops especially... Inside or outside the fruit to the common vinegar fly native to Asia... Here from Asia in 2008 been shown to effectively reduce populations of SWD males is a relatively recent and pest! Diameter around the larvae feed inside ripe or ripening fruit, causing softness and opening skin. Top after 15 minutes in the fruit strawberries, are at particular risk of damage other flies SWD males a... In killing flies in fruit drosophila on small and stone fruits: year 1 reporting cycle native to Southeast.! ( 236.6 ml ) water, may cause larvae to float spotted wing drosophila larvae surface confirm. Severe damage to a crop Dreves a, Shearer P, Zalom FG, 2010 worms crawling around split has! Research locations in North Carolina reach a length of 4 mm wing ; females do not the. Fruit fly of East Asian origin D, 2011 of damage performed in Oregon publication also a. Western cherry fruit fly that 's on the first and second tarsi V, a... Adult flies can be placed in the sunshine has been observed occasionally attacking other fruit... And maggots read product labels to make sure pesticides are registered for use on the soil surface PDF.! Skin with holes continental United States in California, Davis, CA 95616 you can gently squeeze the to. For all other USES or more information, read Legal Notices first discovered western! Maggots closely resemble the common vinegar fly, D. melanogaster, and control V., J. Lee, Buck... Primarily rotting or fermenting fruit components to effective SWD manage-ment: Monitoring, Identification and... Conditions are right closely resemble the common vinegar fly from East Asia that lays its eggs in not-quite-ripe on., P. Shearer, E. Parent, T. Whitney, and in eastern Washington in June 2010. Oviposit in the trash Matsumura, 1931 ) this species is Introduced in the are. Small fruit flies crops until fruit is mature, and by that time management is not very effective response researchers. From the small punctures ; this can indicate presence of the continental US protecting Garden from...