A single green horned tomato worm can consume all of a plant’s leaves in a very short period of time. This large green caterpillar has a voracious appetite and eats constantly, so they grow very large very quickly. It is possible for them to grow as large as six inches in length and one inch in girth.
Follow these tips to eradicate hornworms from your garden:
1. Check your plants every day for signs of these pests. These signs include:
- Chewed leaves
- Caterpillars
- Frass
- Eggs
What do caterpillars eat? Note that when green tomato worms eat leaves, they usually leave the veins and only eat the flesh of the leaf. When you see this, you can be sure you are dealing with hornworms. More on Caterpillars eating leaves.
2. Be thorough! Scan both sides of leaves and look around on the ground for signs of worms on tomato plants. Be aware that hornworm poop is quite large. In fact, you may even mistake them for rabbit droppings.
3. At the early stage, you can just give the foliage a good, vigorous spraying with plain water to knock small caterpillars off and drown them. This goes a long way toward solving your problem.
4. In addition to a visual inspection and spraying with water, try spraying your plants with a solution of dish soap and water. This spray mixture causes the caterpillars quite a bit of distress. They’ll move around trying to get away, and you will be able to see them and catch them. Just drop them into a bucket of soapy water to finish the job.
there are generally two generations of a caterpillar with a red horn per year. Hornworms show up in early and late summer and feed on tomatoes, eggplants, peppers, and other members
The first line of defense are beneficial insects. Green lace wings and ladybugs are predators of the hornworm. Boost the population has been officials by releasing them early in the season and avoiding used to any pesticides that kill beneficial insects.
The last stage or in instar of the hornworm will eat ninety percent of the foliage all the previous stages, so it’s important to evaluate your tomatoes and get those hornworms early. During the hot of the day look at the interior at the plant look towards the exterior in the morning or evening also be alert for the black droppings or frase, that indicates the presence of the worms.
Just pick of any hornworms that you find and you can feed them to the chickens, they love them. If you find a hornworm with lots of white pod sticking out of them, leave it alone the pods mean it has been parasitized by wasps and will soon die and the wasps will spread and destroy other hornworms and pest caterpillars.
The garden-variety paper wasp is also a helpful predator up the horn worms. If you see damage and you know it’s from a hornworm but you can’t find the hornworm consider spraying a product with Bacillus thuringiensis labelled to kill caterpillars.
Bacillus thuringiensis or Bt is a naturally occurring bacteria that attacks caterpillars but leaves other insects such as beneficials alone. A product like this Safer caterpillar killer as an example of a Bt product.
Prevent hornworms from coming back next year by practicing crop rotation and tilling.
Tilling kills ninety percent of the pupae of hornworms in the soil. If you do see a hornworm I know you’ll be amazed at how beautiful they are but they can be treacherous to your tomato crop,
