Wtf is this y'all?

[Budson 420]

Problem: grey moldy looking stuff on highest fan leaf.

Medium/grow method: seedling soil, it has nothing in it.

Feed: and supplements used: seasol complete garden health

water source: water straight from the tap

Strain/age: ladyburn 1974 week 4 day 4ish

light used: 250w MH, 23w cfl for secondary's

Climate: absolutely horrible, anywhere from 9 degrees to 17.. cold!

Additional info: checked plants before I left for work, all good, come home 10 hours later to find this grey-ish mould type substance ONLY only on the two top fan leaves, the twisted munted looking leaves is from my horrible top I tried last week, so the two are not connected in any way, while writing this I touched said substance and it was hard, and rubbed off, leaving under it a brown dark patch, I have a auto 20cm away from this plant and it has no signs, literally everything is the same With both plants yet it's only happening to the ladyburn, I do have a theory, having temps so low and when the fan blows straight onto the plant maybe something's happening? Fuck I dunno... help!

 

[Budson 420]

Oh and I've just flipped it to flower 2 days ago if that's anything to go by
@Waira @namvet25

 

[Trichome farmer]

Oh and I've just flipped it to flower 2 days ago if that's anything to go by
@Waira @namvet25

any pictures im sure that would help with a diagnosis maybe powdery mill dew but i really dont know

 

[namvet25]

Either midew or mold probably caused by the low temps.You should remove the infected leaves and sray with a plant fungiside .Those temps are way to low and should be around 75 to 80F You should have a small fan circulating fresh air 24/7.

 

[Waira]

... yup, looks like mildew mate,... got neem oil? There's a Potassium bicarbonate product that works too, or most any food-safe product made for fungal infections,... cold and high RH are the promoting forces here!

 

[Budson 420]

Either midew or mold probably caused by the low temps.You should remove the infected leaves and sray with a plant fungiside .Those temps are way to low and should be around 75 to 80F You should have a small fan circulating fresh air 24/7.

Leaves have been removed, on my way to the store shorty to find a safe spray

... yup, looks like mildew mate,... got neem oil? There's a Potassium bicarbonate product that works too, or most any food-safe product made for fungal infections,... cold and high RH are the promoting forces here!

I'll see if I can get some neem locally.. it's a small town, versatile stuff that!

Thanks for the snappy response times fellas! AFN's lucky to have such doctors on hand
Swapping out the 250w MH for my 600w HPS hopefully that'll bring my temps up, if not I have picked out a small fan heater with a thermostat, that'll have to wait until Friday so I can travel to get it.
Thanks again guys!

 

[Budson 420]

Put the 600w in, fan speed controller set around 25-35% temps steady at 26 degrees
Hopefully she's on the mend shortly.
Thanks again guys!

 

[Waira]

on the temp,... -on the RH%...!! ...Mind that mate, low RH like that is a source of a whole new set of troubles! Try to get it up into the upper 30's at least,... a mini humidifier (like for medical use), or even a wet hand towel hung openly can help raise it s bit,....