Bad News for Tomato Hornworms, Good News for Us

Screen Shot 2018-08-24 at 7.30.40 AMWhat are those white ovals on this tomato hornworm found in the Pitney Meadows Community Gardens?

They are the pupating cocoons of braconid wasps and a welcome sight in the garden. The wasp is a beneficial parasite that lays its eggs on the hornworm.

As they grow, they feed on the hornworm. Once the wasps emerge, the hornworm dies and the wasps look for another hornworm to repeat the cycle.

It is good to see our gardens are a good habitat for the wasp, which will help us keep tomato hornworms out of the garden.

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