Pests
Trichogramma emerge and seek out a variety of eggs which they parasitize and thus destroy.
Some moth eggs attacked by trichogramma wasp are: armyworm, bagworm, European corn borer, peach borer, squash borer, cankerworm, alfalfa caterpillar, cutworm, corn earworm, wax moth, tomato hornworm, cabbage looper, and codling moth
European Corn Borer (Pyrausta nubilalis Hb).
Appearance and Habits. The corn borer winters in larva form, an inch-long, flesh-colored caterpillar with inconspicuous black dots, in old stalks left around the garden and pupates in the same stalk. Yellow-brown moths appear in late May or June to lay white eggs on the underside of corn leaves over a period of 3 or 4 weeks. These eggs start hatching about a week later, and the young larvae chew small, round holes in leaves and move toward and into the plant stalk, leaving behind sawdust-like excrement on the leaves and outside the stalk. If you see bent stalks, the larvae have already done a lot of damage inside the plant.
Pic. 1 - European Corn Borer (Pyrausta nubilalis Hb.) adult moth,
1а - larva, a smooth caterpillar,
1г - borer working in ear of corn, with frass protruding,
1д - borers overwintering in old corn stalks
1е - pupa and larva inside corn stem, borer frass protruding from hole,
1ж - female moth laying eggs on corn leaf.
Biology and Life Cycle
