Amazing Caterpillar Parasites (Trichogramma species) control over 200 species of Caterpillars, making them the most popular bio-control in the world. They're so tiny (1/50" from wingtip to wingtip) you probably won't even see them. They work by laying their eggs inside moth or butterfly eggs so that, instead of a new generation of Caterpillars, another Parasite generation hatches out and goes on to repeat the cycle.
Application: For best results, Parasites should be released when Pest Moths or their Caterpillars are first seen, and further releases continued weekly or bi-weekly until Caterpillars are no longer present. Use 5,000 - 25,000 per acre, depending on the level of infestation. Caterpillar Parasites come as eggs ready to hatch. 5,000 eggs glued to a small piece of cardboard. Placed around the garden, they'll hatch and breed from there.