Week 5 flower leaves "rusting" up - Help

T

trontreez

Well-Known Member
Hi, I've noticed some rusty looking spots on select fan leaves recently. I sprayed with pyretherum approx. 1 week prior and it's been a little cold lately at night (12-15c). Any ideas what it is ?

Grow details:
Outdoors
5th week flower
Coco/perlite medium
hydroponic liquid nutrient solutions 62.5% strength
ph approx 6 in
 

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Ive got the same things and no idea. Im hydroponic and i over fertilized and nuked my roots so ive got all sorts of def. Most of the deficiencies i understand, but this i dont. I have also used foliar sprays - epsom salt and mineral matrix - under lights and my current hypothesis is light burn.
 
Yeah probably light burn too. Just wasn't sure. Plant seems to be relatively healthy though so fingers crossed.

Anyone else ???
 
I followed the directions on the bottle. Sprayed in the evening after the temps had dropped. The only thing I can think of was I gave it a kinda heavy spray. Damn aphids. What do you mean by "hot-mix" ?
 
trontreez said:
I followed the directions on the bottle. Sprayed in the evening after the temps had dropped. The only thing I can think of was I gave it a kinda heavy spray. Damn aphids. What do you mean by "hot-mix" ?
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You should dilute it with water. The mix is pyrethrin and water. I only use 1/4 or 1/2 strength on them.
 
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