What's the problem with the leaf?

[Lardass]

Hello can you guys tell what my issue is from this leaf photo?

Thanks!!!

 

[Bird of Hermes]

Kind of looks like powdery mold or some other type of fungus not sure though. Is this the only leaf on the plant that had this going on?

 

[Maple_Flail]

i see white bugs under side of the leaf.

get a loop to verify if alive or dead.

magnified image will help.

 

[Bird of Hermes]

i see white bugs under side of the leaf.

get a loop to verify if alive or dead.

magnified image will help.

I thought about that right after I posted my eyes are messed up too much atm to see that well but there's definitely some junk on the undersides.

 

[Lardass]

More photos here

More photos here

Kali mist strain 7wk flower Dwc

600w hps was too close so I moved it up 2 weeks ago.

5.8ph
Lucas formula general hydroponics muted

Only the middle leaves what were too close to the light have problems. Outside leaves look green

 

[Lardass]

Close ups

Close ups

Same leaf different light

 

[Maple_Flail]

Still see a white little pest on the middle finger by the base in the first two pictures.

you could have a calcium deficiency, however i think those white bugs could turn into a much bigger problem,

at 800x600 res on the pic i can't really tell you anything other than i see something foreign

 

[Lardass]

Back of leaf

Back of leaf

With a loupe looks like tricromes

 

[djimb]

My first thought, not looking closely, was mites, but after seeing more photos and the comment that only the leaves that were closest to the light were affected, I'm going to say It's most likely just burn. It also looks like the trichomes are missing on the affected parts of the leaves, which supports heat being the issue, as they would vaporize before the leaf surface burned.

If you looked over several leaves with a loupe and saw no pests or eggs, it's safe to assume there are none. It is possible there's a deficiency in those plants due to the greater rate of metabolism that would be induced by more light, but I think you might have solved the problem by raising the light.

Of course, you should still keep a close eye on new growth, and watch the plants that seem unaffected. If the problem gets worse or spreads, you'll know something else is wrong.

 

[superpedro]

Hi.

First picture, I too thought it was bugs.

What about your climate? Any chance the humidity has been a little bit out of range?
If that happens, they have more trouble dealing with IR and heat in general. If its been too high, it could also explain the necrosis looking like Ca def.

Nice grow besides that

 

[Lardass]

Light and heat stress?

Light and heat stress?

Few more photos. Shes almost done but i have a clone id like to grow and avoid the same problem if it is a nutrient problem.

 

[Lardass]

Humidity has been around 30% during flower

 

[Lardass]

Any help?

Any help?

Looking for some advice still please

 

[MrBungle]

it looks like a few problems going on at the same time...


Bugs, perhaps not enough fresh air? abnormal temperature swings? The brown spots look like a P def... a lotta stuff going on

 

[stoney917]

Lucas and deck don't work great gh crushes in dwc just can't use 6/9 u need the green bottle in true hydro systems... use a 7.5grow 5 micro 2.5 bloom for veg and 2.5 grow 5 micro 7.5 bloom for flower... back ya light off and if there are no bugs should be fine... looks like some bug issues goin on to by the white spots under leaves they may be about to take over the plant... if it's nutes and heat easy fix if it's bugs u in it waist high