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One of my Yucca plants are covering the leaves. I had a problem with them last year too. The Yucca bloomed this year so although the leaves began to look rough, the plant evidently was strong enough to put up a bloom spike.
I would like to know what the bugs are and how to treat for them and if they're detrimental to my plant. I looked in the bug files and think they look most like Tumbling Flower Beetle (Mordellistena cervicalis) although it's hard to tell from the picture.
I think they are a beetle of some kind. Their bodies are black and they have a red head with antennae. They are very small, like a small ant. And, there are hundreds of them of all sizes.
Please help me identify this nasty and find a way to rid my poor plant of them. I have three Yuccas in the bed but so far they are only infesting the oldest one. I live in central Indiana in Zone 5.