The tomato fruitworm is a tomato pest that burrows into the immature fruit. Biological pest controls such as Bacillus thuringiensis and parasitic wasps will help you stop the damage.
Green fruitworm is a small, skinny caterpillar with a row of dark bumps running down its back. The young larvae are green but they turn gray or brown as they age and develop lengthwise stripes.
The moth from which the fruitworm arises, lays its eggs on tomato foliage at dusk. Once the larvae hatch, they move from fruit to fruit eating a little here, a little there and leaving black droppings in and on the fruit.
And they don't just have a taste for tomatoes.
They also frequent
hot peppers and they adore corn. Planting these 3 crops in close proximity is tantamount to inviting these unwanted guests to spend the summer at your place.
You don't need to treat your tomato garden at the first sighting but if you find several worms or eggs, it's time to take action.
Parasitic wasps are natural enemies of tomato fruitworms. Look for black eggs on your tomato leaves (Fruitworm eggs turn black once they have been parasitized.)
If you don't already have these good bugs in your garden. Buy some and release them in your tomato patch.
Another good biological pest control for this tomato worm is Bacillus thuringiensis or BT. BT is a bacteria which kills fruitworms by preventing them from eating. It's a liquid that you mix with water and spray onto the plants.
BT is nontoxic to humans and wildlife.