What's Eating My Tomato Plant Stems

Tomato plants are a popular choice for gardeners because of their delicious fruits and ease of cultivation. However, these plants are often subjected to attack from pests and diseases. One common issue that tomato plant growers face is stem damage. The stems of tomato plants may be eaten by various animals and insects or may suffer from fungal diseases. This article will delve into the various pests and diseases that could be causing the stem damage on your tomato plant.

Tomato Hornworms

Tomato hornworms are the larvae of large moths that lay their eggs on tomato plants. These larvae are extremely voracious feeders and can quickly strip a tomato plant of its leaves and even its stems. They usually feed at night, so it's difficult to spot them. If you have noticed stem damage on your tomato plant or have seen large caterpillars on your leaves, your plant may be infested with tomato hornworms. The best way to control these pests is to handpick them and destroy them or use a biological control like a parasitic wasp. Insecticides are also effective against tomato hornworms, but be sure to choose one labeled for use on vegetables.

Aphids

Aphids are small, soft-bodied insects that feed on sap from the tomato plant. They often congregate on the stems and leaves of the plant and can cause significant damage. Aphids secrete a sticky substance called honeydew that can attract ants and mold. They also transmit viral diseases. If you have noticed aphids on your tomato plant stems, you can control them by spraying the plant with insecticidal soap or blasting them with a jet of water. Beneficial insects like ladybugs and lacewings can also help control aphid populations.

Cutworms

Cutworms are the larvae of several species of moths that feed on the stems of tomato plants. They cut through the stem near the base of the plant, causing it to wilt and die. Cutworms are particularly damaging to young seedlings. You can control cutworms by placing a collar around the base of the plant or by applying a biological control like Bacillus thuringiensis (Bt).

Fungal diseases

Fungal diseases like verticillium wilt, fusarium wilt, and stem canker can cause stem damage on tomato plants. These diseases usually start on the lower leaves of the plant and move up to the stems. They cause the stems to turn brown, wilt, and eventually die. Unfortunately, there is no cure for these diseases once they have infected a plant. The best way to prevent these diseases is by planting certified disease-resistant tomato varieties, rotating crops, and avoiding overhead watering.

Conclusion

Tomato plant stem damage can be caused by various pests and diseases. By identifying the culprit, you can take measures to control the damage and prevent future infestations. Remember to always read labels and follow instructions when using pesticides and other control methods. With proper care, you can enjoy healthy and thriving tomato plants that produce a bountiful harvest.