One of the worst things for gardeners is seeing those small holes chewed into the leaves of their vegetable plants. A tiny beetle may be able to be seen quickly hopping away if you look more closely. What you saw was the flea beetle feeding in a destructive way. What exactly are these annoying bugs, though? Let’s find out and learn how to spot them.
What Does a Flea Beetle Look Like?
Flea beetles are very small insects, only about 1/16 to 1/8 inches long. They are usually oval or oblong in shape with enlarged hind legs that allow them to jump quickly, much like a flea This is how they got their descriptive name as “flea” beetles.
There are over 2,500 species of flea beetles worldwide. Some of the most common culprits in vegetable gardens are .
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This specific type of flea beetle is small, black, and shiny, and it likes cabbage plants.
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Striped flea beetle – black with white crescent stripes along the sides.
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Potato flea beetle – tiny and shiny black, feeds on eggplant, potato, tomato.
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Pale striped flea beetle – black with white stripes, has a wide host range.
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Tobacco flea beetle – brown with dark spots on sides, prefers tobacco and related plants.
In general, flea beetles tend to be quite small, rounded, and dark in color, sometimes with lighter stripes or spots. Their enlarged back legs and ability to jump are key identifiers.
What Do Flea Beetle Holes Look Like?
More often than seeing the beetles themselves, you’ll notice the damage they leave behind. Flea beetles chew many small holes in the leaves of plants. These round holes are typically about 1/16 inch in diameter. Sometimes so many are chewed that the leaves take on a lacy, skeletonized appearance.
The holes and feeding damage are most noticeable on seedlings and young plants. If a severe infestation occurs early on, the plant may not even survive. On mature plants, the beetles feed on leaves but rarely do enough damage to kill the plant. But they certainly can slow growth by reducing photosynthesis capabilities.
Where Are Flea Beetles Most Likely Found?
As their name suggests, flea beetles are fantastic jumpers. They readily hop from plant to plant when disturbed. But they do like safe places to eat and lay their eggs.
In gardens, flea beetles will seek shelter in places like:
- Under leaves, dirt clods, rocks
- In leaf litter or crop debris
- Near the base of host plants where they lay eggs
Scout around susceptible plants like cabbage, radish, eggplant, and potato to see if you notice the small round holes. This can help pinpoint areas of heavy infestation.
How to Get a Picture of Flea Beetles on Camera
Trying to photograph a tiny, jumping insect can be tricky! But here are a few tips to help you get that perfect flea beetle picture:
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Use a macro lens or close-up filters to get detailed, magnified shots. This will let you see the beetle’s shape, markings, and other identifiers.
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Mount your camera on a tripod and use a remote shutter release to avoid shaking and scaring off the beetle.
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For action shots of jumping, use a fast shutter speed to freeze motion.
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Position yourself near ground level and watch for beetles on the undersides of leaves. Move slowly and stay still.
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Take lots of shots in quick bursts to increase your chances of capturing a crisp image.
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Use a shallow depth of field for an artistic, blurred background.
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Add fill flash to evenly light the subject if needed.
With persistence and the right techniques, you can get professional-looking flea beetle images. These can help accurately identify the species damaging your plants or serve as warnings to other gardeners. Outsmarting these tiny pests starts with knowing exactly what they look like and how they feed.
While flea beetles can be a challenge to photograph and control, a little knowledge goes a long way. Learn to recognize the small round holes they leave, scout for areas of heavy feeding, and use cultural or organic methods to protect plants. A clear picture of the flea beetle’s appearance and habits will help you minimize their impact. With some dedication, your garden can jump for joy over these defeated pests!
Biology Crucifer flea beetle larva
- Flea beetles spend the winter as adults in trash piles, hedgerows, windbreaks, and wooded areas.
- Adult flea beetles become active in early spring. Females of different species lay one or more eggs in small holes in the roots, soil, or leaves of many vegetables. They also sometimes lay eggs on flowers and ornamental shrubs and trees.
- When the eggs hatch, the small white larvae eat the roots of the new seedlings.
- Larvae then transform into pupae in the ground. There are usually one to two generations per year.
Damage caused by flea beetles
All types of flea beetles cause similar damage.
- Adult flea beetles eat the leaves and stems and do the most damage.
- They leave shallow pits and small, round, uneven holes in the leaves that are usually less than 1/8 inch wide. This type of damage is unique to flea beetles.
- Plants grown from seeds are more likely to die from feeding damage than transplants, but both can be badly hurt if there are a lot of flea beetles.
- For the most part, the larvae don’t hurt the plants much (except for potato flea beetle larvae).
A green turnip leaf with irregular holes from flea beetles Flea beetles on collard greens
Drawing a flea beetle
FAQ
How do you identify a flea beetle?
How to identify flea beetles. Most adult flea beetles are very small (1/16 –1/8 inch long). An exception is the spinach flea beetle, which is 1/4-inch long. Flea beetles can be black, bronze, bluish or brown to metallic gray.
What is the problem with flea beetles?
Adult flea beetles feed on the undersides of leaves leaving small pits or irregularly shaped holes on the leaves. Large populations can kill or stunt seedlings. Older plants rarely suffer economic damage, although their older, lower leaves may be damaged. Adults do most of the damage.
What is a tiny beetle that looks like a flea?
Flea beetles are small beetles that jump. The adult beetles feed on leaves, chewing small pits that produce shothole wounds, resembling injuries that might be produced by fine buckshot. Young stages (larvae) of most flea beetles feed on the roots but some develop chewing leaves.
Are flea beetles harmful to humans?
No, flea beetles are not harmful to humans. They don’t bite, sting, or transmit diseases to people.