Spotting a tomato hornworm is hardly a dream gardening milestone, but for many home growers, it is a painfully familiar one.
One Reddit gardener turned that frustrating discovery into a small badge of honor — only for other commenters to spot an even stranger detail hiding in the photo.
What happened?
A gardener on Reddit's r/vegetablegardening shared a photo of a large green hornworm hanging onto a tomato plant.
"Found my first hornworm. Does this make me an official gardener?" they captioned their post.
Attention in the comments soon moved beyond the clearly visible caterpillar when someone noticed another hornworm in the background.
That commenter pointed out that the second pest had parasitic wasp eggs on it and advised leaving it alone, writing: "There's a second in the background with parasitic wasp eggs on it, leave it there and it'll take care of itself."
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The insect's ability to do serious damage also came up in the thread.
Tomato hornworms can chew through leaves, stems, and fruit quickly, and one commenter described how fast the problem escalated.
"I looked out from my deck one evening, and the tomatoes looked fine. The next evening, one was a skeleton. Went over and it was these buggers… they can be devastating."
Why does it matter?
For people growing their own food, pests such as hornworms are more than just unpleasant to look at.
They can wipe out part of a harvest that gardeners may have been counting on for fresh meals, lower grocery costs, and produce that often tastes better than store-bought options.
Gardening can also offer benefits that go beyond food.
Spending time tending plants can help people stay active, get outside more often, and reduce stress. Many gardeners see it as supportive of both mental and physical well-being, which can make pest damage feel even more discouraging.
Parasitic wasps are beneficial insects that use hornworms as hosts, eventually killing the pests.
That means gardeners do not always need to turn to harsh chemical treatments, particularly when helpful insects are already doing some of the work.
What can I do?
If you grow tomatoes, peppers, or similar plants, checking them regularly can make a major difference.
Hornworms are experts at blending in, so gardeners should watch for missing leaves, stripped stems, and the dark droppings the pests leave behind.
If you do spot hornworms, hand-picking them off plants is one of the easiest nonchemical options. And if a hornworm has white eggs from parasitic wasps attached to it, leaving that one alone can help support beneficial insects.
For more details on managing the issue safely, check out our resource on controlling pests without chemicals.
One of the most repeated suggestions in the comments was to inspect plants at night with a black light flashlight, since hornworms can glow and become much easier to spot.
"Do yourself a favor and buy a cheap black light flashlight, they glow in the dark and it's sooo much easier than looking during the day," a commenter advised.
Other users vouched for the tip.
"Can confirm the black light works. I used it tonight to pick off some hornworms," a user replied.
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