That to the winder family of butterflies counting insect (Sparganothis pilleriana) is widespread throughout Europe and appeared again in Germany towards the end of the 1990s. The pest occurs in more than 100 plants and is preferred in wine-growing areas vines, The springworm hibernates as a roughly 1.5 millimeter long, greenish caterpillar with a black head in a web, preferably in the bark cracks of the trunk. They hike in spring tracked on the shoots, drill into the swelling buds and hollow them out. In the vicinity of the small drilling site, dark droppings can be found as a characteristic. After this expulsion from the now gray to dirty green caterpillars leaves infested and eaten and therefore also called leaf-worm. Also petioles, notes and young ones shoots are infested.
After a size of about one centimeter is reached, the caterpillars start spinning the eaten leaves together. Inside, they become up to four centimeters long and quickly leave the web in the event of a meandering movement (hence springworm). After about 50 days, pupation takes place at the end of June. The main flight of the hatched butterfly lasts up to five weeks at night. After mating, the females lay egg packets (with hundreds of eggs each) on top of each other like roof tiles. After 10 to 20 days, the small caterpillars hatch, but do not eat, but instead rappel to the trunk for the winter. The fight is done by insecticides or biologically at peak flight time through the disrupter (Pheromone trap), or by the soil bacterium Bacillus thuringiensis, See also a list of all pests and diseases below Vine enemies,
© PP Kohlhaas / AGES Vienna