problem with white powder like on leaves!!!

Leonardo

Leonardo

Active Member
Im growing indoors and my problem is this:
water forms by its self on a part of the leave, Then that dryes and where it was wet becomes white like, Im thinking its powdery mildo. I dont have a way of buying sulfer evaporator what can i do if it really is the mildo?

Help please!!!!!!
Leo from Brasil
 
mogie

mogie

Well-Known Member
I am curious as to how water forms by itself on your leaf. Is your humidity level too high? Do you foliar feed? Why would the leaves be wet? What is your ph level? What is the temp of your grow room? Did you get fertilizer on it? What strength are you using?
 
Leonardo

Leonardo

Active Member
I dont spray or wet to much, I did cut all the bottom fan laeves and the buds look awsome but I got the white powder like stains on the water leaves ner the buds. Also I noticed that some of the leaves r rolling down but not to much!!!! Is it going to be ok? please telme so!!! Tanks for replying
from brasil 420 grower!!!!!
 
Leonardo

Leonardo

Active Member
You r just joking please cutting the fan leaves dont fuck them up!!!!!!!!!!!!!!!!!!????????????????
 
Air

Air

Well-Known Member
No shes not joking the more leaves you got(to a certain extent), the more lights going to hit them the more/bigger buds you are going to have.
 
mogie

mogie

Well-Known Member
Symptoms:

White powdery fungus grows on the upper leaf surface of the lower leaves and flower parts.
Leaves may be twisted, distorted, then wilt and die.
On some plants such as kalanchoe, infected leaves have dry, corky, scab-like spots and fungal growth is not obvious.

Conditions favoring powdery mildew:

High relative humidity at night
Low relative humidity during day
70-80 F (22-27 C) temperatures (These conditions prevail in spring and fall)
The spores are carried by air currents and germinate on the leaf surface. Liquid water on leaves inhibits spore germination. The fungus grows on the leaf surface but sends fine threads (haustoria) into the cells to obtain nutrients. From the time a spore germinates to the time new spores form may require only 48 hr. High humidity favors spore formation while low humidity favors spore dispersal.

Some powdery mildew are inhibited by free moisture on leaves while others are favored by wetness on leaf surfaces.
 
G

greenman1

Active Member
Ok,
So whats the best cure once you have it?
Especially late in the game?
Sulphur burning or is there a foliar spray safe to use in the last 4 weeks
that won't ruin the buds?
 
N

Nugz101

Active Member
Im no genius, but if your watering with anything besides distilled or pure water, ti could be small amounts of chlroine. If you leave drops of tap water on a black dish, and let the water dry, it leaves a white spot from chlroine. so idk that oculd be it tho.
 
potroast

potroast

Uses the Rollitup profile
Spray your plants well with a Neem Oil solution. Neem will kill powdery mildew it contacts in a day or so.

HTH :mrgreen:
 
G

greenman1

Active Member
Hit them tonight with a Serrenade solution prior to seeing your post.
My friend swears by it and says it's safe.
Checked my PH, and Humidity.
Also noticed some leaf curling and purple edging on some of the leaves.
Fingers crossed.
If that doesn't work I'll go with the neem oil.
What exactly is it?
Overall everything looks real good.
Not alot of the stuff as I caught it right away.
Thanks for the advice.
I'm determined to win here.
 
TillthedayiDIE420

TillthedayiDIE420

Well-Known Member
Dont snort coke around your plants, and you wont have white powder there enymore :)
haha jokes

im sorry but i cannot help you, i have never had white mildo on my plants leafs :S
 
Bigbud

Bigbud

Well-Known Member
Leonardo said:
Im growing indoors and my problem is this:
water forms by its self on a part of the leave, Then that dryes and where it was wet becomes white like, Im thinking its powdery mildo. I dont have a way of buying sulfer evaporator what can i do if it really is the mildo?

Help please!!!!!!
Leo from Brasil
Click to expand...

does this happen when the lights are off and you see it first thing in the moring?

if so then it sounds like the temp is dropping to much at night

i had this happen the other night to a plant i have to move to another room and i left the window open in that room all night and it frezzing here in the uk and when i looked in the morning there were drops and white marks where drops had been

i think this was due to having a hot pot of soil and plant and a cold room

after closing the window i havent had this happen again so it could just be a temp problem
 
Leonardo

Leonardo

Active Member
big bud Ithink you are right I wasthinking of that.
also I was putting the plants in the sun in the day, and indoors at night, because of 12 yes and 12 no light.
not doing that anymore and it reduced a little the problem but not completely.
 
G

greenman1

Active Member
Leonardo,
I can confirm that extreme temperature changes will often create favorable conditions for powder mold.
As others have mentioned.
Check your PH. You really want it a bit acid (not too much)
I don't grow in soil so for me that means about 5.8-6.0.
Check your hunidity (50% or lower)
I use a de-humidifier and try to keep it it between 35%-45%
Do not mist especially before they go dark.
Monitor carefully.
I have had crops with no powder mold at all and others where
it appeared.
Sometimes it doesn't matter what you do and it shows up.
The spores are always present.
It is just about whether the conditions cater to it and whether the strain
is ressistant or not.
What I have found over the years is that certain strains are more susceptible than others.
Bottom line. Always disconcerting as it often kicks in towards the end
around week 6 of flowering.
The earlier you catch it the better.
Think I nailed mine this time.
Good luck.
 
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