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Because it eats everything it sees.

like what?

poisonous sprays and a disease-inducing bacterium and introduction of the beetle's natural enemies (certain parasitic wasp and fly species)and it plants

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Wiki User

13y ago
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Wiki User

9y ago

Japanese beetles are harmful because they are pest that can feed on leaves, flowers, and fruits of many plants and trees like roses, hibiscus, impatiens, birch trees, plums, and blackberries. The Japanese beetle belongs to the species Popillia japonica.

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Wiki User

13y ago

Japanese beetles are very bad for a garden. They eat plants quickly, but multiply even quicker. They may seem harmless at first, but then when they infest your yard, they might be a problem. They are called scarabs or scarab beetles, and they can put massive holes in your garden's leaves in almost 2 weeks or less, depending on how you handle the situation. The only way to really get rid of them, is to buy a Japanese beetle trap. It draws them over with the sweet scent, then traps them in a plastic container which they can't get out.

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Wiki User

13y ago

They can kill trees and falling trees can be dangerous

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Wiki User

12y ago

The Japanese Beetle is harmful to a man. Unless you think of it differently, it could possibly be helpful.

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Wiki User

9y ago

The Japanese beetle is harmful to the environment because it is from the country Japan

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Wiki User

11y ago

because it sprays poison

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Wiki User

10y ago

why the japanese beetle is harmful

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George Paolucci

Lvl 3
4y ago

I don’t now

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George Paolucci

Lvl 3
4y ago

No

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Q: Why is a Japanese beetle harmful?
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