![]() ![]() If you decide to go this route, make sure to check which pesticides are approved for your area. There are also several organic and inorganic foliar sprays you can use to poison the hornworms when they ingest it. These caterpillars blend in well with the foliage they are chowing down on, so it can be difficult to spot the larvae themselves.Toss tomato hornworms in soapy water to dispose of them Use Insect Spray The caterpillars feed until late summer or early fall before pupating for the winter. They deposit their eggs on solanaceous plants, preferring tomatoes over all others. The second generation emerge as adults in midsummer, when your tomatoes are growing happily. These sizable pests finish two generations per season, overwintering as pupae and emerging in the spring as adult moths.įemales lay eggs on leaf surfaces, where the caterpillars will begin to feed once they’ve hatched.Ĭaterpillars feed and grow quickly, reaching their maximum size in three to four weeks, at which point they drop off the plant to pupate in the soil. The adults have six yellow spots on each side of the abdomen, not five like M. The tobacco hornworm caterpillar, however, has diagonal white lines on its sides, and a reddish colored horn on the last abdominal segment.
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