Tomato seedlings are delicate and can attract a range of pests that can harm or even destroy them. So, who eats young tomato plants, and how can you protect them? Here are the four most common pests and expert advice on how to combat them effectively.

Who Eats Young Tomato Plants?
Whether you’re getting ready to transplant your tomato seedlings or they’ve already been planted, you may have noticed that something is eating them. From nibbling and stinging to sucking, various pests target tomato plants. Understanding which pests are causing the damage and how to fight them is crucial to saving your plants and ensuring a healthy harvest. Here are the most common pests that attack tomato seedlings and how to protect your plants.
1. The Slugs
Slugs are notorious for their destruction, particularly during hot and humid weather. They typically appear at night, devouring the leaves of your tomato plants and even killing young seedlings. Their mucus trails are a clear sign of their presence.
How to fight slugs:
- Use granular baits to eliminate them.
- If you prefer organic methods, create a physical barrier using ash, which slugs dislike. Reapply after rainfall.
- You can also place citrus peels near your tomato plants—slugs are attracted to the citrus instead of your crops.
2. Colorado Potato Beetles
Colorado potato beetles are another common pest that loves to feast on nightshade plants, including tomatoes. Both the adult beetles and their larvae are destructive, chewing through leaves and weakening the plant. You’ll often find orange-yellow eggs in clusters on the underside of leaves.

How to fight Colorado potato beetles:
- Plant garlic or castor oil plants near your tomatoes to repel the beetles.
- If you spot eggs or adults, crush them and destroy the larvae.
- If necessary, wait until the larvae are about the size of a grain of wheat before applying an organic insecticide to effectively eliminate them.
3. Flea Beetles
Emerging in May, flea beetles are known for targeting young tomato plants, especially shoots and leaves. These pests cause small, circular holes in the foliage, and in some cases, the stems may have lesions.
How to fight flea beetles:
- Spray your plants with nettle manure twice, a few days apart.
- For more severe infestations, use natural insecticides like neem oil or pyrethrum.
- Prevention is key: mulch around the base of your plants to increase humidity, as flea beetles dislike moist conditions. Wood ash and an anti-insect veil can also help deter them.
4. Noctuids (Tomato Moths)
Noctuids, or tomato moths, are dull gray moths whose caterpillars feed on the leaves, stems, and even the roots and fruits of tomato plants. Early in the season, they can cause significant damage, making prevention essential.
How to fight Noctuids:
- Use an anti-insect veil to protect your plants or set up pheromone traps to catch the moths.
- If an infestation occurs, spray young caterpillars with insecticide.
- Consider using pyrethrum decoction, a natural pesticide, to control the larvae.
Conclusion
Protecting your tomato seedlings from pests is essential for a successful crop. By recognizing the common pests that attack your plants, such as slugs, Colorado potato beetles, flea beetles, and noctuids, you can take action early to fight them effectively. Use a combination of preventative measures and natural remedies to keep your plants healthy and thriving.


