How to Kill the Hornworms Eating My Tomato Plants

Tomato plants are a popular vegetable for many gardeners, but they are also a favorite target for hornworms. These pests can quickly destroy tomato plants, ruining all the hard work you've put into growing them. However, there are several effective methods for killing hornworms and keeping your tomato plants healthy.

Identifying Hornworms

The first step in killing hornworms is identifying them. These pests are large, plump caterpillars that can grow up to 4 inches long. They are green with white stripes and a horn-like protrusion on their tail. You may see them chewing on the leaves of your tomato plants or notice their droppings on the ground below.

Manual Removal

One method for killing hornworms is manual removal. If you only have a few plants, this can be an effective way to get rid of the pests. Simply inspect your plants regularly and pick off any hornworms you find. Wear gloves or use tongs to protect your hands from the spines on the hornworm's body. Once you remove the hornworms, place them in a bucket of soapy water to kill them.

Bt Spray

Bt spray is another effective method for killing hornworms. Bt or Bacillus thuringiensis is a bacteria that is harmful to hornworms but non-toxic to humans and other animals. It can be applied as a spray to the leaves of the tomato plant, and when the hornworms ingest it, they stop feeding and die within a few days. Bt spray can be purchased at most garden centers and should be applied according to the instructions on the package.

Diatomaceous Earth

Diatomaceous earth can also be used to kill hornworms. This is a natural substance made from the remains of tiny marine organisms called diatoms. The powder is sprinkled on the leaves and around the base of the tomato plant, forming a barrier that the hornworms can't cross. When the hornworms come into contact with the powder, it damages their exoskeleton, leading to dehydration and death.

Neem Oil

Neem oil is another natural insecticide that can be used to kill hornworms. It is derived from the seeds of the neem tree and is non-toxic to humans and other animals. The oil is applied as a spray to the tomato plant, coating the leaves and stems. When the hornworms eat the leaves or come into contact with the oil, it affects their nervous system, causing them to stop feeding and die within a few days.

Conclusion

Hornworms can quickly destroy tomato plants, but there are several effective methods for killing them. Manual removal, Bt spray, diatomaceous earth, and neem oil are all natural methods that can help protect your plants. When using any of these methods, always follow the instructions carefully and wear protective gear if necessary.