Identifying and Controlling Tomato Hornworms

If you've discovered small holes in your nearly ripe tomatoes, the culprit is likely the tomato hornworm. These caterpillars feed on the leaves and fruit of tomatoes, eggplants, peppers, and potatoes. Young larvae are white, but they mature into a deep green that blends perfectly with foliage, making them difficult to spot.

Effective Control Methods

You can manage hornworms by hand-picking them off plants or by applying an organic pesticide containing Bacillus thuringiensis (BT), commonly sold under brand names like Dipel or MVP. BT is non-toxic to humans, pets, and the environment, and can be used right up to harvest. These products are available at local garden centers or through online retailers such as Gardens Alive (gardensalive.com).

Prevention for Next Season

To reduce future infestations, rotate your crops next year and thoroughly till the garden each fall to destroy pupae—the offspring of the tomato hornworm. These practices disrupt the pest's life cycle and help keep your plants healthy.

If you have further questions, feel free to reach out again.

Regards,
Mike