Summer and tomatoes wouldn't be complete without the familiar tomato hornworm. When the systems of Integrated Pest Management (IPM) are working as they should, the hornworm, which is destructive of tomatoes, will be parasitized by a tiny wasp that lays its eggs on the back of the hornworm. As the eggs become tiny cocoons containing wasp larvae (the little white objects) they draw sustenance from the body fluids of the hornworm, eventually sucking it dry and killing it. So, no spraying is necessary to control the hornworm as long as the little wasps are present to do their thing:
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