Something killing my plants.. help

Hi all,

Something is snacking on my plant, but i literally cannot find anything!!

Growth gets stunted and goes twisted as well, especially in flower with badly reduced yields.

So this is the 3rd crop in a row this has happened. I have tried using Nuke em spray full strength multiple times, also have introduced some lady bugs into the room now. Nothing has worked. Also get some brown patches on leaves.

Pls can someone help as genuinely thinking of quitting this is doing my head in now.

Growing in Hydro, RO water with 200ppm calmag + nutes. Total PPM is 650. On the 2nd week of 12/12
PH is steady at 5.7-6.0. They are drinking plenty of water and the ppms slowly going down too.

Definitely looks like something snacking on your plant leaves but that shriveled up picture looks like too much heat Maybe.
Could be a couple things happening.
Hopefully someone that actually knows what's going on will chime in.

Its grubs or caterpillars caused originally by moths. If you dont fix it will become a major issue. You can get a residual caterpillar spray for the leaves like carbaryl. Carbaryl is a broad spectrum insecticide used to control most chewing insects. It is a contact and stomach poison that paralyses the nervous system of the insect .

I wouldn't use anything that says "Poison" on my plants.

What about BTits a bacteria that kill corn burrowers and such.
Iv used it for them