what deficiency is this? plz help

i have four white castles and they are all starting to show the same signs on the fan leaves, but its the worst on this individual plant. This plant is the runt of the group and seems to be suffering more than the others. I've upped my does of cal/mag but it doesnt seem to be helping. should i try flushing???? ive only got a few pics but will post more later

it looks like spider mite damage

...that really looks like spider mites...Battled em every grow I had. Read up on neem oil , it always works for me, but you gotta read up on it...dont do it before the light hits the plants, it will burn them. do it right before darkness..and you gotta keep on top of mites...they will only get worse.. I am only a 3 year grower, not yet an expert.........but neem always worked for me....prevents certain fungus and other critters as well......i grow outdoors though, if those are indoor plants, I believe you might have to do a complete grow room clean up ....not sure...

I thought spider mites also. Neem oil every 5 days for 30 days.

I've inspected the back and front sides extensively and dont see any sign of mites. the reason i believe this is a deficiency is because i have a different strain growing right next to these ones and that plant is perfectly healthy.

did you inspect the underside of the leaves with a scope? mites are hard to see with a naked eye

Hi there my friend,
Ive got some auto flowering plants growing which some leaves looked like yours, alot of people on another site said it looks like spider mites but it turned out to be a cal def, but ive also seen some pictures of ozone damage that looked the same' i think the pictures in one of the stickys on here. Like everyone has said check for spider mites frist but i know with mine there wasn't anything like that but im not saying thats whats going on with yours" just something to look into if you dont find any, ill try and find my picture that looks like that and upload it here for you. Hope you get to the bottom of whats going on

I should have my new scope by tomorrow so i'll do some closer inspection and hopefully some pics to go with.

Hi there,
Nice blog on flushing and will defo try it seems you ain't had no probs like that in 10 yrs. Sorry about saying ozone damage i should have remembered that ozone damage only come from an ozone generator, i was under the impression that normal conditions can make that happen (my bad lol) a phosphorus def can also my tiny rust looking spots on leaves, but you also get stunted growth and darkish green leaves like when theres to much n.
If you dont have mites i'd look into cal def and phosphorus def as they are the only 2 i know of thats gives the tiny rust spots but again im not an expert just a new grower trying to help out another new grower lol

hey guys heres a few close ups of the WC im growing, and that deficiency up close. doesnt look like mites to me!!

first two pics r of the bud leaves, and the last two are the front and back of the fan leaves where i have the spotting. gonna flush tomorrow

Looks a bit like salt buildup. What sort of pots you running? Flush with 3 times the pot volume should sort it out.

i'm growing in 5gal buckets, will be flushing tomorrow