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The caterpillars of Winter Moths eat the buds of fruit trees and in the course of the year go on eating flowers and leaves, leaving small holes in the leaf tissue. In case of heavy infestation, the caterpillars leave only the leaf veins and stalks untouched. The caterpillars are light green and have a very characteristic way of moving: they can arch their whole body by using body tension.
The wingless females climb up tree trunks in autumn and lay their eggs. In spring and early summer, you can find the caterpillars.
In autumn, you can equip endangered groves with a glue ring. They have to be attached firmly to the trunk and supporting stakes if necessary. This stops the females on their journey from the soil to the crown. You should control the glue rings regularly and replace them when they become dirty or dry. In any case, replace the glue ring in the beginning of spring.
Insecticides containing bacillus thuringiensis can be used to control Winter Moth. Avoid insecticides containing Acephate, Malathion, Carbaryl Bifenthrin, Cyfluthrin, Fluvalinate, and Permethrin.
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