Why Does My Tomato Plant Have Lumps In It?

Tomatoes are a staple in many gardens, but sometimes these beloved plants develop mysterious bumps or lumps. There are several possible reasons for this, including:

1. Insect Damage

One possible cause of lumps on tomato plants is insect damage. Stinkbugs and aphids are common culprits that can cause these growths. These pests feed on the plant's cells and release chemicals that cause the plant to react with growths or bumps. These bumps can be unsightly, but they usually don't pose a serious threat to the plant's health.

2. Tomato Russet Mites

Another possible cause of lumps on tomato plants is the tomato russet mite. These tiny mites feed on plant cells and release chemicals that cause the plant to grow the bumps. Tomato russet mites can be difficult to see with the naked eye, but a clue to their presence is that the tomato's leaves may turn bronze or yellowish brown. The bumps they cause can become quite large but can also be managed with various treatments.

3. Rust Fungus

A third possible reason for lumps on tomato plants is rust fungus. This fungus often appears on the leaves but can lead to bumps or growths on the stems and fruit as well. Rust fungus looks like reddish-brown bumps and can be treated with fungicide.

4. Physiological Disorders

Generally, lumps on tomato plants that do not have any insects or fungus issues present may simply be due to a physiological disorder. For example, tomato seedlings that grow too quickly in cool conditions may develop corky, lumpy growths. Alternatively, tomatoes grown close together can develop growths on their stems, called girdling roots. These growths are caused by a lack of airflow caused by crowding, that causes the plants to strain to grow.

Conclusion

There are various causes of lumps or bumps on tomato plants. In most cases, these bumps do not pose a significant threat to the health of the plant, but they can be unsightly. Insecticides, fungicides, and pruning can help minimize the growth of bumps caused by pests, fungus, and physiological disorders. As such, during a plant's growing season If you happen to notice lumps on your tomato plants, identifying the cause and seeking treatment earlier rather than later could reduce the possibility of permanent damage.