Sevin^® Insect Killer Ready to Spray, for hose-end spraying with a regular garden hose, provides the same highly effective control against hornworms and more than 500 insect pests. ... You can treat tomatoes and many other garden favorites right up to one day before harvest.

Can I spray Sevin on my tomato plants?

Yes, Sevin Dust can be used on tomatoes for various insects. This product is only labeled to be used up to 7 times a year. Wait at least 3 days before harvest.

What kills tomato worms?

bT Spray for Hornworms

Spraying the leaves and soil with Bt Spray as soon as you notice the caterpillars is also a good bet at beating them. Use Bt and spray the leaves and soil and help kill the hornworms off. BT (Bacillus Thuringiensis) is a bacteria that infects and kills caterpillars.