As you baby your plants with tomato fertilizer spikes, plenty of water, and a little TLC, keep them secure with these anti-
To kill tomato worms naturally, mix some liquid dish soap and water in a spray bottle, spray it on the tomato plant, and then shake some Cayenne pepper onto the plant and on the tomatoes. The soap kills the worms, and the cayenne pepper will keep them away if the soap washes off of the plant and they try to come back.
An annual flower that helps to deter tomato hornworms is the marigold. Its strong-smelling essential oils repel a variety of insect pests, including the hawk moth that lays hornworm eggs.
Introducing wasps, ladybugs, or green lacewings to your garden can also help control the tomato worm population. These insects feed on tomato worms and their eggs. Applying Bacillus thuringiensis, or Bt, to your infested plants will kill tomato worms as well.
Make a Deterrent spray
“You can use a homemade garden spray to manage the hornworm population and a useful and effective recipe for hornworms is a mixture of cayenne pepper, water, and soap,” says Kantor.
Spray plants with Bt.
You can also spray plants with Bt (Bacillus thuringiensis) applied according to label directions. When you spray, worms will ingest the Bt and continue eating leaves for a while but die shortly after. Spray Bt as a preventive treatment if you have had severe armyworm problems in the past.
Planting Marigolds with Tomatoes
So why do marigolds and tomatoes grow well together? Marigolds and tomatoes are good garden buddies with similar growing conditions. Research studies have indicated that planting marigolds between tomatoes protects the tomato plants from harmful root-knot nematodes in the soil.
French Marigolds are highly effective at deterring a variety of garden pests due to their strong scent. They are especially useful in repelling aphids, mosquitoes, whiteflies, and even root-knot nematodes, making them ideal for vegetable gardens.
Basil repels tomato hornworms as well as aphids, flies, mosquitoes and spider mites, so it's worth growing in your garden beds as well as near your doors and windows. Like tomatoes, basil benefits from a deep, thorough watering.
▶ Look for missing leaves at the top of the plant
Feeding damage, in the form of missing leaves, occurs first on the tops of plants, where the caterpillars feed at night. During the heat of the day, caterpillars take shelter on or under interior leaves.
For larger treatment areas, Sevin Insect Killer Concentrate is perfect for use with pump sprayers, while Sevin Insect Killer Ready to Spray offers hose-end spraying with a regular garden hose. These two liquid concentrates kill by contact and keep protecting against hornworms for up to three months.
Results of Tomato Hornworm Infestation
With the larvae eating the leaves and new stems of plantings, the planting may die, although plants can typically recover if the hornworms are removed early.
The adult form of the tomato hornworm is a relatively large, robust-bodied moth, commonly known as a hawk moth or sphinx moth. The adult moth feeds on the nectar of various flowers and, like the larval form, is most active from dusk until dawn (Lotts and Naberhaus 2017).
Plant your tomatoes in the full sun (8+ hours) at least 3-4 feet apart, leaving space between plants. This will discourage slugs, which cannot withstand the sun and avoid open ground. Apply BT spray, which is also approved for organic gardening, if tomato hornworms or other caterpillars attack your plants and fruits.
Control: Begin applying weekly sprays for fruitworms as soon as tomatoes begin to bloom and set fruit. Products containing spinosad will control fruitworms, but products containing pyrethroid insecticides (permethrin, cyfluthrin, bifenthrin) will control fruitworms as well as stink bugs and leaffooted bugs.
Marigolds are known for repelling not only tiny pests like knot root nematodes (those are the nematodes that are not beneficial), tomato hornworms, cabbage worms, thrips, squash bugs, whiteflies, but they have also been known to repel even large pests like deer!
Marigold companion planting enhances the growth of basil, broccoli, cabbage, cucumbers, eggplant, gourds, kale, potatoes, squash and tomatoes. Marigold also makes a good companion plant to melons because it deters beetles. Beans and cabbage are listed as bad companion plants for marigolds.
Petunias (Annual)– These annual flowers come in a variety of bright colors and can help repel aphids, beetles, tomato worms, and squash bugs.
Planting marigolds too close together can result in poor air circulation, which increases the risk of fungal diseases like powdery mildew.
Where to grow marigolds. Marigolds need full sun and a reasonably fertile, well-drained soil. Smaller marigolds make good edging plants for borders and do well in pots, while taller or larger-flowered marigolds can be grown in large pots or in borders.
As you baby your plants with tomato fertilizer spikes, plenty of water, and a little TLC, keep them secure with these anti-hornworm gardening tips: Lure them away with basil, marigolds, or dill. Apply insecticidal soap to plants to kill smaller worms.
Treat Early for Best Control
If this happens in your yard, you can control armyworms with an insecticide. If you find armyworms in your lawn, apply granular Ortho® Bugclear™ Insect Killer1 using a spreader or Ortho® Bugclear™ Insect Killer for Lawns & Landscapes Ready-to-Spray using your garden hose.
Another important predator is paper wasps, Polistes spp. This common wasp feeds on many types of caterpillars including those found in gardens. Tomato hornworms are also parasitized by a number of in- sects. One of the most common is a small braconid wasp, Cotesia congregatus.