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Jun 12, 2018 at 18:58 vote accept Daniel
Jun 12, 2018 at 18:57 comment added Daniel Thanks. It has been hot (every day is above 27 C and some above 33) and it is very dry in the summer here - norm for summer is upper 20's. They are moving, though they are very few (I've never seen more than one at once) and right now I saw nothing under the leaves. They just seem to be moving around on the top that I've seen. The plants otherwise appear very healthy, so I'll definitely do the wiping down and/or hosing and I'll try to get a better view on them. Thanks so much!
Jun 12, 2018 at 5:34 comment added user33232 Let me know what weather you have. Clearly warm attracting the mites. Is it humid? What is the forecast. Also, I live in the UK so can only give advice with our chemicals and biological control. You need to check if numbers are increasing. If it is mites, check if they’re moving. If not, you have the nymphs that will turn into adults. Ii know it’s difficult but a confirmation would be best. Check leaf underside as well. Try wiping them off or hose them down if plant is strong enough for now.
Jun 12, 2018 at 0:12 comment added Daniel Thanks. It is not in a greenhouse. Pictures of spider mites look similar I think. They are incredibly small and hard to make out any characteristics on and sadly my camera can't take a more detailed picture. There are no dusty or web-like residue under the leaf. Are there good proactive measures that I could take in case it is that? Online I see everything from luke-warm water to heavy insecticides.
Jun 11, 2018 at 7:07 history answered user33232 CC BY-SA 4.0