U most likely will need a 80x to 120x scope to check them. If it were thrips you would see them for the most part...check the tops and see if theres nymphs adults or larvae.
Thrips need
spinosad. Some mites are controlled with it. Mites really need a suffacant. Something with essentail oils in it. It shuts down receptors and the insect dies.(my understanding is that's how it).
Rubbing acohol on well watered plants is ok too....50% kills on contact. Raise lights to 4 5 ft away and spray a few leaf's and wait and see. Its kind of rough on the ladies but they manage....MUST BE WATERED GOOD BEFORE being sprayed....i water wait 1 maybe 2 hours and then spray.....peroxide, vinegar, and water works for bugs too. I eliminated thrips with this once before.
Spinosad did a way better job though...
Theres lots of enthomopathogenic fungi that kill insects too including mites. Ites are eazy to kill just like every other bug....LEARN THE LIFE CYCLE AND FIGURE OUT A COURSE OF ACTION TO BREAK IT! This mantra will eliminate most if not all bugs....borgs? Trash, burn, clean, sanitize, clean, and sanitize....lol jmo. Ive had russets, cyclamens, thrips, and broads....lol as fas as i know they are gone. Only catch i dont have a scope higher than 60X....ill be getting a celestrom 5mp camera...lol...then ill know for sure.....
I wold like to get into bug studies on canna....that's gunna be where people spend (guessing here) 5 to 10% or more of there revenue chasing all these critters out of their grow area...
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