Tomato Hornworms - Knowledgebase Question

ABERDEEN, Ma
Question by karentoombs
April 14, 2008
Last year, my tomato plants were inundated with Tomato Hornworms. Is there a solution to getting rid of theses pests? I did a lot of picking them off my plants and squishing them. PLEASE HELP!


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Answer from NGA
April 14, 2008

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Tomato hornworms can be 4-5 inches long at maturity, and seeing them can be quite a shock! Hornworms are the larvae of a large moth (Manduca, with a wingspan of 3 1/2 - 4 1/2 inches). The adult is attracted to tomatoes, eggplant, peppers, potatoes, dill, and various weeds. She lays her eggs on the host plant, the eggs hatch, and the larvae feed and feed. They have voracious appetities and can denude a tomato plant in a day! Handpicking is the best defense. You can use the botanical Bt (Bacillus Thuringiensis), which is a bacterium that acts as a stomach poison, and is quite effective against most caterpillars. To keep hornworms away from your tomato plants next year, try interplanting dill. (Hornworms like dill and are easier to see and remove on the wispy dill foliage.)

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