Flower leaf issue ID help requested

[MoFog]

On week 9 of flowering - DWC. Fungus type brown spots are appearing on high bud leaf. Added some calimagic thinking calcium/mag issue? No change after
two days

 

[70's natureboy]

very slight over feeding, problems at the top of the plant are usually over feed problems. Those look like they have a long way to go for week 9, must be weak lights.

 

[MoFog]

Thanks. When flowering in DWC what TDS should you shoot for? I am at 450. Should this be lower? Full plant pics where a few weeks old. The microscope ones are current. LED 250 watt at plug
Tks again for reply

 

[Renfro]

Looks like some sorta mold growth for sure. Do you have any bud rot going on? Whats your RH% running (day and night)? They look very immature for 9 weeks of 12/12.

 

[MoFog]

Hunidity is an issue here. Have a small dehumidifier. runs between 58% and 52%. 52% being the lowest. Temp is 70 to 75 F Water starts at 65 and rises to 72 before a change out. I use chilled water for make up to keep it down. Two fans in use plus a charcoal exhaust.
New pics taken this morning. Can I treat this with anything like a powder? Or is it all humidity?
Thank you for feedback.

 

[Renfro]

You may look into a product called Actinovate since RH% is an issue.

Two fans in use plus a charcoal exhaust.

So if you are exhausting for heat then you are also exhausting the dehumidified air making it impossible to really dehumidify, probably just a waste of energy to run the dehumidifier when the exhaust in functioning.

 

[MoFog]

Logical, Turning exhaust off! We'll see how that smells Thanks,

 

[MoFog]

Hey again - Actionovate is rather pricey - If humidity drops will this go away without treatment? Perhaps a better dehumidifier would be a better investment?

 

[Renfro]

Logical, Turning exhaust off! We'll see how that smells Thanks,

Some growers, myself included, run a carbon filter / fan combo as a scrubber, simply recirculating the air in the grow area, removing the majority of the odor. This also helps the exhaust as that filter only has light work remaining as the scrubber did the bulk of the odor mitigation.

 

[Renfro]

Hey again - Actionovate is rather pricey - If humidity drops will this go away without treatment? Perhaps a better dehumidifier would be a better investment?

Usually an active growth won't be eliminated by just lowering the RH% after the fact although this can greatly slow growth.

An H2O2 solution sprayed on the mold should help kill it off but areas that aren't hit won't be killed off.

 

[MoFog]

Thanks for the insight - Trying all of your thoughts.

 

[MoFog]

Didn't work so well. Hit 79 RH and 79 F rather quickly. Will try the H2O2 at 10% and keep trying to reduce RH. Thanks again, MoFog

 

[coreywebster]

I cant see any sure sign of mould.
Just some burnt tips and possibly some zoomed in pics of a bit of leaf necrosis.

Can you take some pics that are close enough to see this brown shit but not so zoomed in you cant tell what your looking at.

 

[Sade]

Some growers, myself included, run a carbon filter / fan combo as a scrubber, simply recirculating the air in the grow area, removing the majority of the odor. This also helps the exhaust as that filter only has light work remaining as the scrubber did the bulk of the odor mitigation.

Very good points and an intake fan bringing in fresh outside air would drastically drop temperatures as well