Pteromalus; rider apanteles; trichogramma vs cabbage plant pests
Caterpillars of cabbage butterflies cause such damages: edges of cabbage leaves were eaten by pests heavily sometimes remained intact only thick veins.
Cabbage butterflies are yellow-green with black spots and blotches, arranged in rows. The body length of up to 40mm, covered with bristles and hairs. Pupae overwinter on the walls of buildings, fences, shrubs and trees. In the spring big (55 - 60mm wingspan) butterflies fly out. The fronts of the wings are with black corners, and the female butterflies have two round black spots on the wings.
Butterflies lay their eggs in small heaps (15-20 each) on the leaves of cabbage plants. After a week or two, yellowish with black head young caterpillars appear. First they cling together; feeding on the underside of leaves, and then crawl out.
Large role in reducing these cabbage plant pests play rider apanteles, which lay eggs in the body of caterpillars; trichogramma and pteromalus parasitizing in pupae.
Good results in the fight against the cabbage butterflies give the drug ethno-bakterin-3. It is used in an amount of 10g per 10liters of water. At spraying is necessary to try to capture the underside of leaves.