The tiny trichogramma wasp also sees this egg laying and gets ready to go to work. The moth or butterfly moves off to another garden to victimize it, or you attack it in mid-flight with a barrage of ninja throwing stars. Trichogramma moves in and lays its eggs inside of the eggs of the moth or butterfly by using an ovipositor which she has instead of a stinger. Trichogramma goes on her merry way to find some more bad guy eggs to parasitize. Trichogramma's egg hatches inside of the host egg and the tiny larval wasp eats all of the host, interrupting the plans of the pest insect before it has a chance to eat in your garden.
Nature is brutal, but very effective.
Trichogramma wasps are probably the most widely released beneficial insect in the southwestern United States. It is used by smart growers of fruit, vegetables and ornamentals to control caterpillar and worm pests on their crops. The real beauty of this method of pest control is that the targeted pests can not develop a resistance to trichogramma like it could when a chemical pesticide is used. Trichogramma eats the pests there's no defense against that. Chemicals are as toxic to you as they are to the pests, and often ineffective against the targeted pest due to resistance.