Possible spider mites on lemon tree
Hi there, I have an extremely cold-hardy lemon tree in my apartment that I received about a week ago.
Yesterday, I noticed a few fine webs and some tiny black dots on the undersides of the leaves, and I figured I had spider mites. Since then, I've been spritzing the tree every few hours with a solution of around 50% water, 50% rubbing alcohol, a couple of drops of liquid hand soap and a few drops of tea tree oil. Neem oil is coming in a few days.
I still think they are spider mites, but I can't identify them; they appear to be just tiny single black dots, like individual specks of pepper. At the moment there are only a few of them, maybe 2 on every other leaf, and they almost seem immobile when I've watched them.
I was wondering 2 things: 1, could these be some other kind of insect? I haven't seen any noticeable leaf damage yet, but will post if I notice anything. And 2: are there any other measures I can take to eliminate the little bastards, whatever kind of pest they are?