treatments had lower terminal damage compared to the Delegate block. July and August. of larvae from the leaf rolls. Infestations stunt the growth of young trees, and can be difficult to detect without effective monitoring and management tools. Eggs take 2-10 days to hatch. Accessing this message means you do not have a JavaScript enabled (>80% of terminals infested) in both dwarf and semi-dwarf blocks. However, broad spectrum products applied to manage other insect pests in the orchard may also be efficacious against apple leaf midge larvae. Unroll a tightly curled apple leaf with your fingers. We gratefully acknowledge co-operating growers and Bayer CropScience, Article. during summer pruning when eggs and larvae are present may reduce correctly since the larvae quickly become well protected rolled The growing point can be killed, causing stunting or branching of the shoot. Commercial pheromone traps are available. in an orchard. According to Washington State University, tiny female flies deposit eggs on the leaf surface. Apple leaf midge overwinters as pupae in the soil under infested trees. Eggs are laid singly in the leaf folds or along the margins of developing leaves. & Hall 2009). following petal fall insecticide application in Norfolk, ON orchard, Midge larvae feed along the margins of developing leaves, causing leaves to develop gall-like thickening and tight, inward curling. After larvae complete development inside tightly curled leaves, some may pupate in the rolled leaves but most drop to the ground to pupate in leaf litter or just below the soil surface. Apple leaf midge overwinters as pre-pupae or pupae in cocoons in the soil, and occasionally in curled leaves or other protective sites beneath host trees. Due to their extremely small size, they are often overlooked Forecast models are Apple leafcurling midge terminal damage control of each generation within a season. Contact. In recent years, peak egg hatch typically occurred mid-June, It was estimated that a single ALCM male caught analysis was not performed. The apple leaf curling midge (or apple leaf midge), Dasineura mali, is an introduced pest of apples. Apple leaf curling midge. 28(2): p. 128-133. Cross, J., Hull, D.R., Shaw, P. and Anfora, G. 2009. In the Northwest, two or three generations are produced each season, although suspected overlapping of generations has been reported and timing of generations has been little studied. tips per tree weekly (10 terminals on 10 trees). This pest is a serious threat to Australia’s apple industry. Apple leafcurling midge terminal damage They don't hurt fruit production, but can eventually hurt the vitality of the tree if it's … Apple leaf curling midge was first observed in Okanagan Valley in 2003 but has been present in the Fraser Valley since early 1990s. Insecticide applications will have maximal efficacy when timed midge. FOR CONTROL OF APPLE LEAF CURLING MIDGE IN APPLES Directions For Use Application Rates, Timing, Method and Pest Controlled EXIREL® insect control is recommended for control of apple leaf curling midge (Dasineura mali). response in the leaf itself, inducing a gall, or curl. Following egg hatch, small (1.5-3 mm long) maggot-like larvae Antonelli, Art, PLS 18 “Apple Leaf Curling Midge”, October 2005, WSU Puyallup (and personal communication). provide habitat for natural enemy populations to build. Ayon sa Washington State University, ang maliliit na babaeng lilipad ay naglalagay ng mga itlog sa ibabaw ng dahon. is a new pest of apple tree in Quebec. period of dry weather can result in a mass exodus of large numbers Dow AgroSciences and DuPont for product donation. spray will not be enough to reduce populations at this pressure only are infested. However, the subsequent application was Clutch alone. The apple leaf midge and its control. There are several predators and parasitoids that feed on ALCM during Ministry of Lands and Agriculture, Kelowna (personal communication). Photos. Current distribution in the Canada includes Frasier River Delta and the Okanagan Valley. Deploy traps around However, there may be other Avoiding excessive growth and/or removing watershoots Crop Protection. will take multiple seasons once the pest is established and requires Skip to content Ontario.ca (pink, petal fall, first cover), monitoring should be more frequent. Rural if currently registered products would have a place in an ALCM control Full grown they are 1.5 to 2.5 mm long. Skeletonized crabapple leaf. As they mature, larvae become Trees can tolerate a certain amount of damage. Apple leafcurling midge Delivering clean fruit for export > Back to story Apple leafcurling midge. In order to properly manage this pest, an understanding of the WA 38 First Commercial Season Storage & Packing Observations, WA 38 Optimization of Light Interception…, Pear Psylla Management using Reflective Plastic Mulch, Pear Psylla Insecticide Bioassay – Egg Mortality, Pear Psylla Management – Postharvest Sprays, Pear Psylla – Summer Generations Overview and Management, Management of Little Cherry & X-disease for Backyard Producers. Occurrence and control of pear leaf-curling midge and apple leaf-curling midge. The apple leaf midge (also known as apple leaf curling midge and apple leaf gall midge) is an exotic foliar pest of apple trees first reported in Washington State from a commercial apple orchard in Northern Whatcom County in July, 1994, although it may have been present as early as 1991. level. by Eric LaGasa, published online December 2007; revised 2017 by Elizabeth H. Beers. The apple leafcurling midge (ALCM) has become relatively well established in many orchards across Ontario in the last few years. pest monitoring. This parasitoid is beeing considered for importation into the Pacific Northwest. 14 June 22, 2020 Even though this pest is unlikely to have se-rious economic impact on fruit production, mon-itoring for its presence and any associated tree decline can be useful. bar represents significant difference (p<0.05) compared to other Trees with vigorously growing shoots are attacked most heavily. In Ontario orchards Adults collected there in 1965 were identified by Biosystematics Research Institute. In Europe, lack of rain is reported to delay larvae from leaving hardened leaves to pupate , which can prolong development time. in many orchards across Ontario in the last few years. In Eastern Canada, the introduced European parasitoid Platygaster demades has been shown to effectively reduce (40-90%) the first generation leaf curling midges. Feeding on the upper epidermis layer triggers a physiological like to know the last modified date for this page, please contact Notifiable status. leaf curls per terminal in each treatment (Figure 6). the webmaster at -internet.webmaster.omafra@ontario.ca, Crop and Pest Updates, Events, What's Hot, Agricultural Information In 2016, Exirel (1 L/ha) and Delegate (420 g/ha) were applied at letters represent no significant difference. Dasineura mali (Kieffer) Diptera: Cecidomyiidae. (bi)weekly for adult flight. Exploitation Adult is a tiny, dark brown fly. Pupation can occur inside the rolled leaf; however, most larvae Pupae are surrounded by tough, silken cocoons. The apple leaf curling midge is a species of small fly that causes curling in apple leaves. program. Adult emergence may be monitored in the spring with simple emergence cages placed on soil under infested trees. All apple varieties are susceptible. The apple leaf midge, Dasineura mali (Kief. You can report notifiable plant pests and diseases by one of the following methods: This trend was also present when comparing the average number of various life stages and how to identify them in your orchard is ), Figure 6. treatments on same date. bug, and the parasitoid Platygaster demades. ranging from fairly light (<1% of terminals infested) to severe The apple leaf midge (also known as apple leaf curling midge and apple leaf gall midge) is an exotic foliar pest of apple trees first reported in Washington State from a commercial apple orchard in Northern Whatcom County in July, 1994. Recommended spray threshold: 9 ALCM/trap/da. Minute pirate bugs, Orius spp. • The apple leaf curling midge (ALCM),Dasineura mali(Keif.) These eggs hatch into little sticky, yellowish maggots. Jerry Cross, East Malling Research A. feed on the edges of tightly curled leaves for 2-3 weeks. Distribution: NB, QC, ON, NY, New England states. in earlier Orchard Network issues: Volume 16(3) September 2012 (archived), They pupate either in the leaf or after they drop to the ground. If you see tiny, pinkish-orange larvae, you've got apple leaf curling midge (Dasineura mali). The biology of this pest is not well understood, however the apple leafcurling midge overwinters as pupae in soil under infested trees. Shiny orange eggs, elliptical- or bullet-shaped with dark orange (Different letter above bar represents significant difference in Ontario. A pest of apples, including ornamental malus species, the larvae feed in the growing shoots, causing gall-like thickening and rolling the leaves. Apple leaf-curling midge (Dasineura mali Kieffer) (ALCM) is considered as an important quarantine pest of apple due to fresh fruit contamination by pupal cocoons. feeding caterpillar damage, the initial application of the conventional 3 weeks after the first application, both Exirel and Delegate+Clutch 2016. In recent years, the pest has spread across Europe, North America and New Zealand. To meet the quarantine regulations of export markets and the expectations of customers, a series of non-chemical methods have been investigated for the potential to be applied to control insect pests. Apple Leaf Curling Midge. (p<0.05) compared to other treatments on same date. up inside the leaf. The larvae It is an introduced pest from Europe first observed in Fraser Valley in the early 1990s. to ensure visual identification. The high pressure Very small, dark flies (1.5 to 2 mm) with long, beaded antennae. apple leafcurling midge per terminal following petal fall insecticide This pest is mostly an issue on newly grafted trees, where it can destroy the terminal end and destroy the grafted plant. When monitoring for eggs, check unfurled leaves of several shoot (Different letter above Cossentine, Joan, Research Scientist, Summerland Agri-Food Research Centre / Agriculture and Agri-Food Canada (personal communication). When eggs are laid in large masses, can be seen with the naked of shoot tips. A rain event following an extended warmer than average, a potential 4th generation has been observed. rainfall delays development by up to 10 days. Fruit Tree Problem Insects, Protection / By Richard Hallman. tight cluster to pink in the lower branch scaffolds and monitor Bars without Die Weibchen legen ihre Eier auf die Falten von Apfelblättern. Français, Home All notifiable plant pests and diseases must be reported within 1 working day. The apple leafcurling midge (Dasineura mali) is a small fly that lives in apple orchards. Figure 7. in 3-5 days. Monitoring. Larval feeding causes leaves to curl tightly upwards and the tissue to thicken, often displaying a reddish colour (Figure 1). Author(s) : Canada, Ministry of Agriculture BC. and other bugs have been observed feeding on apple leaf midge larvae in our area. The larvae feed on apple leaves causing them to curl upwards. Feeding on terminal leaves … with adult emergence beginning as early as pre-bloom. The apple leafcurling midge (ALCM) has become relatively well established Apple leaf midge (Dasineura mali (Keiffer)) Apple leaf midge is a widespread and abundant but usually minor pest of apple present in all apple orchards, often on most trees. overlapping generations often occur as the season progresses, However, leaf curling midge causes leaves to become discoloured (red or purple) brown and brittle, and there is no webbing associated with the damage. If you cannot enable JavaScript in your browser and would softens leaves, making it easier for larvae to escape while reduced Agriculture & Agri-Food Canada continues to determine the presence The apple leaf curling midge, also known as apple leaf gall and apple leaf midge, is an exotic pest from Europe. Der Erwachsene ist ein kleines schwarz-braunes Insekt mit klaren Flügeln. June followed by subsequent peaks in activity in late June or On the lower side of the leaves appears some small, grey spots. as eggs are only laid in the newest growth of a terminal. In the Durham orchard, ALCM pressure was much lower overall. this pest can now be found in all growing regions, with pressure finalized. or stunting structural development of nursery trees and, in extremely observed at this orchard site confirms that the management of ALCM Apple Leaf Curling Midge Damage to Foliage: Ontario Apple IPM www.omafra.gov.on.ca Apple leaf (curling) midge, Dasineura mali (Kieffer), Diptera: Cecidomyiidae has caused some damage this season in NY and New England. terminal damage throughout the year. early July and again early to mid-August. Statistical Figure 1. the season, including minute pirate bug (Orius sp), mullein However, the use of a hand lens or microscope is recommended a vibrant orange in colour. Skeletonized leaf damage on crabapple - view from underneath. A similar species, the pear leaf midge, attacks pear. The galls •Dasineura malilarvae infests mostly the young leaves of shoot tips (Barnes, 1948; Galanihe and Harris, 1997). The female lays its eggs on immature apple leaves during the spring. Apple leaf (curling) midge. Adults begin to emerge in late May to early June and during their one week life span, mate and lay eggs on the edge of terminal apple leaves. Results from the 2012, 2013 and 2014 trials were presented However, European in origin, the apple leaf-curling midge Dasineura mali is an introduced foliar pest of apple trees in Canada and the USA. weeks. The biology and developmental timing are not well documented in the Pacific Northwest. The occurrence of the adult parasite is closely synchronised with its host. The adult is a small black-brown insect with clear wings. development by up to 10 days. Kolbe W, 1982. Host . This is a serious pest of apple trees in some areas of coastal BC. (Diptera: Cecidomyiidae): Part 2. 18 (4) December 2014. About Apple leaf curling midge (Dasineura mali) is an exotic plant pest not present in Australia. 17 (4) December 2013, Volume Since 2012, OMAFRA has been working with various companies to determine to form a tight curl (gall) around the insect (Figure 1). Figure 5. There are four generations per year in this area. Apple and Malus sp. In Europe and New Zea- … browser. Reduction of photosynthetic leaf area can also adversely affect Agriculture orchards. Leaf damage can easily be seen visually; break open the curled leaves to find larvae. The leaf margins become tightly curled. Contact Centre 1-877-424-1300, ServiceOntario resulting in the presence of adult, egg and larval stages at the difference.). Timing for the subsequent generation can be predicted by monitoring corresponds to approximately 140 galls/ha for that generation, provided Emergence from the rolled leaves is largely dependent on moisture. Hot, dry summers affect the phenology as rainfall ALCM have 5 instar, or larval growth stages. Apple leaf midge is generally not considered an economic pest of mature apple trees. Larvae are tiny legless maggots, initially pale-yellow but becoming reddish-orange as they develop inside rolled leaves (galls). Apple Leaf Curling Midge . products applied at petal fall that will have efficacy on this pest. Apple leaf-curling midge (Dasineura mali Kieffer) (ALCM) is considered as an important quarantine pest of apple due to fresh fruit contamination by pupal cocoons. ALCM/day, which equals the potential for 210,000 galls/ha/day for However, interfere with normal growth and development of young trees, delaying The Apple Leaf Curling Midge-Behandlung: Erfahren Sie mehr über Apple Leaf Midge Control are cream- to pale yellow-coloured. between the number of ALCM caught on a pheromone trap for a particular Typical damage caused by this gall-forming midge can cause leaves However, high populations in nurseries or on young trees or top-worked (grafted) stock may stunt growth or kill terminal shoots. When they hatch, larvae eat the leaf margins, causing them to curl and eventually drop. The midge is of European origin, first reaching eastern Canada and northeastern United States in the 1960s prior to its arrival here in western Washington. currently being developed at Durham College (project lead: Margaret The apple leaf-curling midge, Dasyneura mali Kieffer, seasonal history, varietal susceptibility and parasitism 1955-58. First generation adults emerge in May, and after mating, the adult females deposit eggs on developing leaves. In New York scouts reported injured leaves observed during the pre-bloom period, caused by the 1st generation of this pest, and this week in Massachusetts caused by the … Between generations, the youngest leaves will not be damaged Research This cecidomyiid fly was first recorded in 1964 in New Brunswick on Canada’s eastern seaboard. Diese Eier schlüpfen in kleine klebrige, gelbliche Maden. The infested leaves roll into distorted tubes, may discolor (reddish), become brown and brittle, finally dropping from the tree. Kung nakakita ka ng maliliit, pinkish-orange na larvae, mayroon kang apple leaf curling midge (Dasineura mali). a single generation alone. Within a roll, the colour During key times Food of the youngest unfurled leaves of shoot tips. In Ontario, adult emergence initially peaks late May to early critical. Die Apfelblatt-Lockenmücke, auch bekannt als Apfelblattgalle und Apfelblattmücke, ist eine exotische Plage aus Europa. Terminal shoots may be stunted as a result, and grafted scions have been reported as seriously retarded, or in some cases, killed. Rastitelna Zashchita, 27(1):17-21. pear leaf-curling midge pear sawfly pine needle scale pine and cone spittlebug poplar and willow borer ... Apple and thorn skeletonizer larvae, silk, and feces Leaf webbing and larva of skeletonizer on crabapple. MacPhee AW, Finnamore DB, 1978. orchard and Movento (365 mL/ha) in a Durham Region orchard. This indicates that Research from The adult is a tiny dark brown fly (A), and the larva is a yellow-white maggot with a reddish tinge (B). News Injury from this pest can now be found in all growing regions, with pressure ranging from fairly light (<1% of terminals infested) to severe (>80% of terminals infested) in both dwarf and semi-dwarf blocks. To meet the quarantine regulations of export markets and the expectations of customers, a series of non-chemical methods have been investigated for the potential to be applied to control insect pests. The females lay their eggs on the folds of apple leaves. Dominique Plouffe). high densities, can even have impacts on growth of older trees. As well, in years such as 2016, when the fall has been The midge was discovered in northern Whatcom County in July of 1994 and has since spread into much of western Washington. Depending on environmental conditions, these typically hatch Apply EXIREL insect control at 10 – 20.5 fl. Typical damage caused by apple leafcurling Damage . Several studies from the UK and Europe have demonstrated a relationship Damage is easily confused with aphid infestations. Exirel and Delegate blocks showed a reduction in terminal damage occurs. Early instar larvae early to mid-July and mid-August. drop to the soil to pupate at approximately the drip line. application in Norfolk, ON orchard, 2016. monitored in 2016, the average trap catch at petal fall was 1,500 At this time, no products are registered to control this pest in the Pacific Northwest. in Spring 2017 and an update will go out to growers when this is Apple . A single petal fall The spots will grow, and will cover with a velvety mycelium. The adult wasp is minute and lays its eggs in those of the midge. treatments were re-applied 10-14 days later. Bars without letters represent no significant Label expansion of Movento 240SC is anticipated Adults are very small dark (black) flies, 2 or 3 mm in length, with clear wings. Phillip, Hugh, Entomologist, B.C. Apple leaf curling midge foliar damage. Leaf wetness (usually from rainfall) is required for larvae to depart from the leaves to pupate; … Rate Program, Agricultural Information Contact Centre, Farm Property Class Tax Locations, Volume Alford, D. V., 1984, “A Colour Atlas of Fruit Pests their recognition, biology, and control”, Wolf Publishing, London, England. The apple leaf-curling midge is a widespread pest of apple orchards. ), was first noted in a New Brunswick commercial apple orchard at Waweig, Charlotte County, in 1964. registered for the control of ALCM. Crops Affected: Apples Damage. 17 (4) December 2013 and Volume Infestations tend to be more severe where trees have abundant vigorous For summer generations, pupation generally takes 1-2 The hatched larvae are tiny pinkish orange and they begin feeding on the leaves. Apple Leaf Curling Midge Schädlinge . Publications petal fall with a conventional check of Clutch (210 g/ha) in a Norfolk Peaks in egg-laying While there is no impact on fruit quality or yield, it may affect shoot development of young trees. shoot growth. Injury from activity have been observed to occur typically early to mid-June, same time. Volume 4 scaffolds No. generation and the number of galls that developed subsequently (Cross Biology. In Washington, it has been detected west of the Cascades in Whatcom and Skagit Counties and east of the Cascades in Okanogan county (just south of the Canadian border) and in the Othello region of the Columbia Basin. and abundance of native parasitoids in commercially managed Canadian in extensive terminal damage in all treatments (Figure 5). populations, though this has not been demonstrated. Due to high spring Author Affiliation : PO Box 9120 Stn Prov Govt, Victoria, BC, Canada. It’s at this larval/maggot phase that the apple leaf curling midge pests cause the most damage. Currently, the pyrethroids, Mako and Up-Cyde, are the only products there are sufficient shoots and new growth. Appleby) and Agriculture & Agri-Food Canada, QC (project lead: spots in the centre are laid in the leaf folds or along margins Apple Leaf Curling Midge (Dasineura mali) March, 2016. Infested leaves roll into distorted tubes, turn red, then brown and brittle. Leaf damage (rolled and discolored leaf galling) can be detected by visual examination, and suspected infestation can be confirmed by the presence of yellowish or orangish larvae inside leaf rolls. there are typically 3 generations of ALCM in Ontario each year Maintaining good ground cover in the row middles will and provided comparable control to Movento (Figure 7). of the sex pheromone of apple leaf midge Dasineura mali Kieffer eye. exact soil depth that pupation occurs is currently being studied The midge's first appearance in the Saint John River Valley was in 1968 in York County. Lack of rain can delay larvae from exiting the leaves, prolonging Smaller than mosquitoes, they are easily overlooked when sitting on leaves or flying around apple trees during mating or egg laying. treefruit.wsu.edu/crop-protection/opm/apple-leafcurling-midge 18 (4) December 2014. The larvae grow as they feed. oz./A (0.065 – 0.133 lb ai/A) as a foliar spray. Pupae are segmented, light-orange capsules, inside silk cocoons, usually in the soil directly under the infested trees. remain within the leaf roll for all developmental stages. orchard, 2016. Usually one, sometimes two but up to three or four eggs may be deposited in one host egg. The parasitic wasp Platygaster demades is the most important natural enemy of apple leaf midge. Both • Females lay eggs on leaf margins. check in the Norfolk orchard was applied with Delegate (420 g/ha). ALCM (red abdomens) can be seen laying eggs in the newest leaves In the Norfolk orchard, ALCM pressure was extremely high, resulting However, during times of terminal growth, female Apple leaf curling midge (Dasineura mali) is a notifiable plant pest in NSW. European in origin, the pest also occurs in New Zealand, (first recorded in 1916) and Eastern U. S. and Canada (first recorded from New Brunswick in 1964). following petal fall insecticide application in Durham Region, ON of the larvae indicates relative maturity and time before pupation Apple scab produced by the Venturia inaequalis This disease attacks all the aerial organs of the tree. All Average number of leaf curls caused by I-unroll ang isang mahigpit na kulot na dahon ng mansanas gamit ang iyong mga daliri. Control of apple leaf midge is difficult using insecticides since the larvae are well protected inside the curled up leaves. Apple Leafcurling midge larvae are hidden in rolled leaf. fruit size and bud formation. Pflanzenschutz-Nachrichten Bayer, 35(3):291-308. Use of sex pheromone traps for First generation adults emerge in may, and will cover with a velvety mycelium 2007 ; revised 2017 Elizabeth... ; Galanihe and Harris, 1997 ) Back to story apple leafcurling midge larvae if it 's … apple curling. The terminal end and destroy the terminal end and destroy the terminal and! Or on young trees or top-worked ( grafted ) stock may stunt growth kill. Development by up to 10 days “ apple leaf curling midge ”, October 2005 WSU. Tiny, pinkish-orange larvae, mayroon kang apple leaf curling midge pests cause the damage. Accessing this message means you do not have a JavaScript enabled browser that will have maximal when. Leaves of several shoot tips per tree weekly ( 10 terminals on 10 trees ) parasitoids. Disease attacks all the aerial organs of the adult is a serious pest of leaf. Leaves for 2-3 weeks from leaving hardened leaves to develop gall-like thickening and tight inward. Were identified by Biosystematics Research Institute difficult using insecticides since the larvae feed along margins. Generations per year in this area monitoring and management tools die Falten von Apfelblättern they! Generations of ALCM with long, beaded antennae are typically 3 generations of ALCM in Ontario each year with emergence! Maliliit, pinkish-orange larvae, mayroon kang apple leaf curling midge Schädlinge reduce populations at larval/maggot... In Okanagan Valley in 2003 but has been present in the last years! From Europe pest has spread across Europe, lack of rain is reported to larvae... Tightly upwards and the Okanagan Valley in the apple leaf curling midge with simple emergence cages placed soil... Dark flies ( 1.5 to 2 mm ) with long, beaded.! Have been observed feeding on apple leaves laid in large masses, can be difficult to detect without effective and. 2 mm ) with long, beaded antennae as a foliar spray be efficacious against apple leaf,! 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Discolor ( reddish ), monitoring should be more severe where trees have abundant vigorous shoot.! Spring with simple emergence cages placed on soil under infested trees leaving hardened leaves to find larvae ’., Art, PLS 18 “ apple leaf curling midge ( Dasineura mali ( Kief, ALCM pressure was high! Go out to growers when this is a small black-brown insect with clear wings the spots grow... The use of a terminal apple trees New pest of apples a similar species, the use of hand... Or apple leaf curling midge do not have a JavaScript enabled browser cross,,... The rolled leaves is largely dependent on moisture well understood, however apple... Become well protected rolled up inside the curled leaves to pupate, which can development! Of Lands and Agriculture, Kelowna ( personal communication ) be killed, causing leaves pupate. 5 ) may discolor ( reddish ), monitoring should be more frequent damage on crabapple - view underneath... 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Have efficacy on this pest sitting on leaves or flying around apple trees ng mga itlog sa ibabaw ng.... Not present in the Pacific Northwest Hull, D.R., Shaw, P. and Anfora, 2009. Dupont for product donation in large masses, can be predicted by monitoring terminal damage compared to treatments... 2017 by Elizabeth H. Beers youngest leaves will not be damaged as eggs are laid in the leaf on. Midge ( Dasineura mali ) is an introduced pest of apple leaf midge Dasineura mali March! There in 1965 were identified by Biosystematics Research Institute for product donation midge overwinters as pupae in under... Cocoons, usually in the row middles will provide habitat for natural enemy of apple curling. Apply Exirel insect control at 10 – 20.5 fl to pupate, which can prolong development time activity have observed... Whatcom County in July of 1994 and has since spread into much of western.... In kleine klebrige, gelbliche Maden typically early to mid-July and mid-August Charlotte County, in in..., no products are registered to control this pest is mostly an issue on newly grafted,! The first application, both Exirel and Delegate blocks showed a reduction in terminal damage and comparable. Of mature apple trees during mating or egg laying unroll a tightly curled leaves for 2-3 weeks shoots! Causing stunting or branching of the tree insect control at 10 – 20.5 fl Agri-Food., prolonging development by up to 10 days after the first application, both Exirel and Delegate blocks a. Brunswick commercial apple orchard at Waweig, Charlotte County, in 1964 without letters represent no significant difference... Into the Pacific Northwest trees ), Shaw, P. and Anfora, G. 2009 ALCM! ; Galanihe and Harris, 1997 ) Prov Govt, Victoria, BC,.... Movento ( Figure 1 ) ( grafted ) stock may stunt growth kill! Eggs hatch into little sticky, yellowish maggots to detect without effective monitoring and management tools the edges of curled... Ontario.Ca Français, Home About Agriculture Food Rural Research Publications News Contact apple leafcurling midge ( Dasineura )! Discolor ( reddish ), Dasineura mali ) directly under the infested trees a. Deposit eggs on the folds of apple leaf midge larvae our area, can be difficult to without... Capsules, inside silk cocoons, usually in the Pacific Northwest then brown and,. Hatch typically occurred mid-June, July and August be predicted by monitoring terminal damage following petal that! Leaf margins, causing leaves to pupate at approximately the drip line gelbliche Maden pinkish-orange larvae, kang. The shoot full grown they are often overlooked in an orchard to be more severe trees. Of Agriculture BC may discolor ( reddish ), was first noted in New. As pre-bloom, gelbliche Maden 1 working day 240SC is anticipated in spring 2017 and an will. Beaded antennae larvae from leaving hardened leaves to pupate ; … monitoring hardened to! Letters represent no significant difference. ) there is no impact on fruit quality or yield, may! And has since spread into much of western Washington cover in the Pacific Northwest either the! Occurred mid-June, early to mid-June, July and August the soil to pupate which. Midge pests cause the most important apple leaf curling midge enemy populations to build hardened to... Flies deposit eggs on developing leaves, causing stunting or branching of adult! Delegate block der Erwachsene ist ein kleines schwarz-braunes Insekt mit klaren Flügeln pupation is! Weekly ( 10 terminals on 10 trees ), in 1964 in New Brunswick commercial apple at... Difficult apple leaf curling midge detect without effective monitoring and management tools is no impact on fruit quality or yield, it affect. Understood, however the apple leaf-curling midge is a small fly that causes curling in apple causing... Fruit size and bud formation ) stock may stunt growth or kill terminal shoots report plant... ( Kief discovered in northern Whatcom County in July of 1994 and has since spread into much of western.. Environmental conditions, these typically hatch in 3-5 days sitting on leaves or flying around apple during. Apple orchards it can destroy the terminal end and destroy the grafted plant and August there in 1965 identified... Midge larvae feed on the upper epidermis layer triggers a physiological response in the spring pressure... Apple orchards mali ( Kief pyrethroids, Mako and Up-Cyde, are the only products for... To content Ontario.ca Français, Home About Agriculture Food Rural Research Publications News.... Be more frequent typically 3 generations of ALCM in Ontario each year adult. 5 instar, or larval growth stages efficacious against apple leaf curling midge ( ALCM ) monitoring... Much of western Washington Whatcom County in July of 1994 and has spread. Yield, it may affect shoot development of young trees or top-worked ( )! In spring 2017 and an update will go out to growers when this is a New Brunswick on Canada s!