Insecta, Lepidoptera, Tortricidae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- Host plants: apple, pear, rose (Rosa) and sometimes sorbus (Sorbus).
- Egg: embryonic development lasts 7 to 11 days.
- Larva: The caterpillars gnaw the buds (*) then the leaf parenchyma, principally its lower surface. Larval development of first generation is completed 3 weeks after activity resumes.
- The pupation takes place in the rolled up leaves and lasts 2 to 3 weeks.
- 1 to 2 generations per year.
- The larvae hibernate in small brownish cocoons made in the bud axils; they resume their activity when the buds split open.
- The moths appear from mid-June to mid-July. Some larvae grow rapidly and pupate to produce a second generation of adults during the summer; the others develop slowly and build a hibernaculum in September-October.
The damage caused to apple (*) and pear buds can reduce cropping considerably. In the case of rose, damage occurs only on flower buds.
HYPPZ on line : Species (scientific name), Pests (common names), Glossary, Crops.