They can cause allergies or other health problems. Similarly, black, gray, or dark green spots may be sooty mold, which is harmless to plants unless it grows out of control since it's also a ...

Q: How can I find someone qualified to tell me if a very large tree needs to be taken down? I’ve gotten conflicting comments. A: You need a certified arborist. He or she will be a member of the ...

The scale itself will not kill the plants. However, the sooty mold is the real problem. The more insects, the more sooty mold there is. The mold covers the leaves which reduces photosynthesis.

The scale itself will not kill the plants. However, the sooty mold is the real problem. The more insects, the more sooty mold there is. The mold covers the leaves which reduces photosynthesis.