Larval feeding causes leaves to curl tightly upwards and the tissue to thicken, often displaying a reddish colour (Figure 1). is a new pest of apple tree in Quebec. Hosts. If you see tiny, pinkish-orange larvae, you've got apple leaf curling midge (Dasineura mali). LEAF ROLLS AND LARVAE JN:1089 1˚ 10/201 1 DISTORTED LEAVES • rolled and discoloured APPLE LEAF CURLING MIDGE • Larvae [1.5 – 2 mm long] WHEN AN D WHERE TO LOOK • Adult [1.5 – 2.5 mm long] P ho to: W ashin gt on: Jerry Cross, St at e U ni ve rsi ty P ho to: On ta r io A pp l e IPM P ho to: AgrEvo P ho to East … If the attack is strong, the photosynthesis … The larvae are well protected in the curled-up leaves. Apple leaf-curling midge (Dasineura mali) It has 3-4 generations a year and winters in the superficial layer of the soil. Figure 6. Spirotetramat (Movento) has been effective, but timing is important. Apple leaf curling midge was first observed in Okanagan Valley in 2003 but has been present in the Fraser Valley since early 1990s. Once you see larvae in the leaves, spray effectiveness decreases. Damage is easily confused with aphid … Here it is, the larva of a leaf curl midge, all 2 mm of it! A pest of apple trees (Dasineura mali), syns.Sciara mali, Malobrus mali, Perrisia mali); Synonyms []. Infested leaves roll into distorted tubes, turn red, then brown and brittle. All apple varieties are susceptible. Dr Joanne, 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. Apple leaf midge is an introduced pest from Europe first observed in Okanagan Valley in 2003 but present in Fraser Valley since early 1990s. According to Washington State University, tiny female flies deposit eggs on the leaf surface. They can be detected with the naked eye. Photos. "Integrated Pest Management, IPM, is a decision making approach to pest management that involves knowing the crop, the pest, the ecosystem, and the relationship between … Unroll a tightly curled apple leaf with your fingers. The female lays its eggs on immature apple leaves during the spring. Apple and Malus sp. These hatch in 3-5 days and the larvae feed on the upper epidermis causing the margins to curl and roll round themselves. A pest of apples, including ornamental malus species, the larvae feed in the growing shoots, causing gall-like thickening and rolling the leaves. International experience. A European biological control agent may help control an exotic pest of apple trees in western Canada. The midge was discovered in northern Whatcom County in Apple Leaf Curling Midge. The larvae cause the edges of the leaves to curl in characteristic galls, and growth is stunted. Apple. The apple leaf curling midge is a species of small fly that causes curling in apple leaves. If you have had this insect in the past, pheromone traps can be a useful monitoring tool to time sprays. In recent years, the pest has spread across Europe, North America and New Zealand. The apple leaf midge (Dasineura mali Kieffer) is an important pest of apples in the UK, mainland Europe, New Zealand and North America. According to Washington State University, tiny female flies deposit eggs on the leaf surface. • Dasineura mali larvae infests mostly the young leaves of shoot tips (Barnes, 1948; Galanihe and Harris, 1997). Leaf Curl Aphid Control Request Tree And Plant Health Care ... ulative emergence of apple leafcurling midge male and growing futures apple leafcurling midge disinfestation of apple leaf curling midge dasineura mali. Occurrence and control of pear leaf-curling midge and apple leaf-curling midge. Traps  were developed in the UK to catch the males and are used in Canada. Seasonal history, varietal susceptibility and parasitism, 1955-58. 2: 859–869. 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. The hatched larvae are tiny pinkish orange and they begin feeding on the leaves. The first signs of attack appear in may, when twisted and discolored leaves can be observed. The apple leaf curling midge, also known as apple leaf gall and apple leaf midge, is an exotic pest from Europe. The growing point can be killed, causing stunting or branching of the shoot. Eggs take 2-10 days to hatch. 0 When they hatch, larvae eat the leaf margins, causing them to curl … Noun []. Where to order traps: Great Lakes IPM, Inc. Michigan, USA www.greatlakesipm.com; Agralan Ltd, www.agralan.co.uk, http://treefruit.wsu.edu/crop-protection/opm/apple-leafcurling-midge/, https://www2.gov.bc.ca/assets/gov/farming-natural-resources-and-industry/agriculture-and-seafood/animal-and-crops/plant-health/phu-apple-leafcurling-midge.pdf, Thank you to information provided by Lindsay Hainstock, BC Tree Fruits Cooperative; Gayle Krahn, Jealous Fruits; Jerry Cross, UK, Tianna DuPont , when twisted and discolored leaves can be observed to North America and New Zealand in 1950: leaf... Formed per acre for that generation ( Krahn, G. ), when twisted and discolored can... Treefruit.Wsu.Edu articles may only be important in young trees Art and Jenny Glass purplish... 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