tomato horn worm - Knowledgebase Question

Lisbon Falls, Ma
Question by davjcross
June 30, 2010
last year our tomatoes were decimated from tomato horn worms..how can we prevent them from invading practically overnight. Is there something we can use to prevent them again this year. I had heard that you should til your soil in the fall to kill the egss that live in the soil. I refuse to touch them, so picking them off is not an option!


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Answer from NGA
June 30, 2010

0

Look under leaves and all around the plant. You can often spot their dark, pellet-shaped droppings which can help you locate them. If they are out of control, you can use Bacillus thurengiensis or Bt. It is a biological control--a bacteria that kills only caterpillars and is safe to other insects, humans and animals. However, it will kill all caterpillars, including butterfly larvae. Follow package instructions for application.

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