infestation

I noticed some weird white & brown crystals/fuzz on some of the leaves of my jacaranda tree. The substance started out white, but then turned brown. It is very hard and I don't know if I can remove it without tearing off the leave it is on. I have no idea what this is and have tried to...

Hello, i have had a healthy pinus mugo bonsai tree for some time now. About 2 months ago I began styling it with wire. It was doing fine. It got an infestation of millipedes in its pot. I can see them everywhere crawling on the low part of the trunk. I am concerned they are eating the roots of...