I have had a few dens do that when I first bring them inside and under lights in late summer and there was never mites. I've always chalked it up to the lights being hot and dry. This year I made a point of placing them a little off center of the lights and increased the waterimg during the acclimation back to lights and so far, so good.
If there are mites...and I am all too familiar with what to look for because of the ctsm...you will see small pin prick sized holes and a bit of oozing on the underside of the leaves. It's a result of their feeding activity. If you have enough mites to completely stipple the top of the leaves...there will be a good deal of oozing. If you see no evidence of either or both of those things under the leaves...it is safe to say, you don't have mites.
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Hybrid Mode
