Need help, Mildew?

[piledriver]

This has been going on for a couple weeks now and I think its some kind of mold or mildew problem. Theres no bugs of any kind. Plants are Purple Trainwreck about 4 weeks into veg.

The leaves seem to be disintegrating from the stem end on the top and middle sets of leaves. I trimmed all the affected leaves off and tried a sulfur burner but in a week after it was back again.

Temp is from 68 to 75 deg, humidity is high at around 60%, ph around 6.5 to 7.0, pretty good air circulation with a wall fan and a exhaust fan for the lights, screened inlet from the floor with a hepa filter. Should I try a fungicide spray or what , any suggestions? is it too late?!!

Leaves were fine for about a week and now see pictures?

All advice appreciated!! Thanks

piledriver Reviewed by piledriver on 12-02-2009. Need help, Mildew? This has been going on for a couple weeks now and I think its some kind of mold or mildew problem. Theres no bugs of any kind. Plants are Purple Trainwreck about 4 weeks into veg. The leaves seem to be disintegrating from the stem end on the top and middle sets of leaves. I trimmed all the affected leaves off and tried a sulfur burner but in a week after it was back again. Temp is from 68 to 75 deg, humidity is high at around 60%, ph around 6.5 to 7.0, pretty good air circulation with Rating: 5

[piledriver]

Here is some more information on the plants.

H=Answer if you grow hydro or aero
C=Answer if you grow coco
S=Answer if you grow traditional soil
L=Answer if you grow soilless other than coco (Promix, Hyponex, SunshineMix)
R=Answer if you grow in RockWool
T=Answer if you grow in HydroTon
D=Answer if you run any type of automatic drip system, including into soil or soilless
E= EVERYONE needs to answer lol!


E-indoor or outdoor INDOOR
E-soil, soilless, coco, aero, or hydroponic SOIL
E-specific medium
CSL-Soil type/brand SUNSHINE #4
HCL-Hydro/aero/soilless system type DRAIN to WASTE
SCL-Anything you have added to the soil
SCLR-Soil or slab runoff pH ?
E-Water source WELL
E-Source water pH 7.2
HRT-Source water EC (if hydro) ?
E-Age of plant 4 WEEKS
E-Type of fertilizer CUTTING EDGE SOLUTIONS
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added)
E-Lighting source and distance from plant 600W, 24"
E-Air temperature (both day and night if you are running a dark period) 68 to 78 Deg
HD-Reservoir temperature N/a
E-Air % Relative humidity 55% to 65%
E-Lighting schedule 18/6
E-Type of ventilation your room has 16" wall fan, 400cfm vent through lights
TR-Did you pre-soak your media in pH corrected solution?

I had no problem with the last run, the most worrysome thing is these plants are in the same room with my clone mothers, so I need to get to the bottom of the problem or possibly rip them out before the mothers are infected?

Ive been flushing with water for about 2 weeks now and it doesnt seem to help. Normally I water about every 2 days 3 at most. They are in 1 gal pots for about 6 weeks then to 3 gal for flowering, I know they get a little rootbound but thats all the room I have untill I move them to the flower rm.

If this is a mold problem is there something I could spray with to stop or slow this down? Ive read about the Milk spray or baking soda, what do you think? Advice is most welcome!!

[piledriver]

I trimmed all the affected leaves and I sprayed with the milk and water, mixed 1 part milk to 9 parts water. I read somewhere in this section that it works for certain types of mildew and that grape farmers are even trying this as opposed to sulfur spray.

I understand that this may only slow it down and I will have to spray every week which is ok if it will save the crop.

So I'll keep an eye on them for the next few days and see if any mildew returns. As soon as I move these plants to another room I'll do a complete sanitation with bleach etc.

Just FYI, I looked on the farm bureau site and the problems I have (by comparing pictures) look just like what happens to cucumber farmers, its called Downy Mildew and they use some pretty exotic fungicides to combat it. Very common though!

I'm hoping a simple remedy will work to get to harvest this one time then its total sanitation and prevention the next time!!

[wild95cat]

This has been going on for a couple weeks now and I think its some kind of mold or mildew problem. Theres no bugs of any kind. Plants are Purple Trainwreck about 4 weeks into veg.

The leaves seem to be disintegrating from the stem end on the top and middle sets of leaves. I trimmed all the affected leaves off and tried a sulfur burner but in a week after it was back again.

Temp is from 68 to 75 deg, humidity is high at around 60%, ph around 6.5 to 7.0, pretty good air circulation with a wall fan and a exhaust fan for the lights, screened inlet from the floor with a hepa filter. Should I try a fungicide spray or what , any suggestions? is it too late?!!

Leaves were fine for about a week and now see pictures?
All advice appreciated!! Thanks

I have the same kinda problem. Mine looks like the pic on the far left a bit. Looks a little like a miniature slug trail or something but not connected like a trail does...just kinda slimy lookin' patches here n there. I've been reading and it sounds like downey mildew/mold. I haven't found a cure yet...have read that 4 parts water to 1 part milk actually works. Neem oil as well. I've read that lowering ur humidity and raising temps works. If I find a cure I'll let you know...lol. Hope you don't have 2 wait 2 long. XD

If you find a cure b4 me, let me kno...I'll be here smokin' budzzzz :bigsmoke: