Grey spots?
- Thread starter AFaQ
- Start date
SnapsProvolone
Well-Known Member
Pics? If it's fuzzy and round look up powdery mildew.
SnapsProvolone
Well-Known Member
Sure looks like PM to me. Likely your spray had too low pH. PM loves acidic, humid and cool environments.
Do a few searches and you will find all sorts of cures.
I recommend Sulphur vaporizer for rooms. Serenade will treat for a bit. Lollipoping is a technique. Keep humidity low and area warm and if you MUST spray be sure its very slightly alkaline.
Do a few searches and you will find all sorts of cures.
I recommend Sulphur vaporizer for rooms. Serenade will treat for a bit. Lollipoping is a technique. Keep humidity low and area warm and if you MUST spray be sure its very slightly alkaline.
Farmer's Hat
Well-Known Member
Its definitely pm. It is easily cured with a diluted milk/water mix. 1/10 ratio. I have had this problem, and the milk mix took care of it.
The plants also benefit from the calcium in the milk. You are basically foliar feeding the plant calcium while you kill the pm.
Milk has long been popular with home gardeners and small-scale organic growers as a treatment for powdery mildew. Milk is diluted with water (typically 1:10) and sprayed on susceptible plants at the first sign of infection, or as a preventative measure, with repeated weekly application often controlling or eliminating the disease. Studies have shown milk's effectiveness as comparable to some conventional fungicides,[SUP][11][/SUP] and better than benomyl and fenarimol at higher concentrations.[SUP][12][/SUP] Milk has proven effective in treating powdery mildew of summer squash,[SUP][12][/SUP] pumpkins,[SUP][11][/SUP] grapes,[SUP][13][/SUP] and roses.[SUP][13][/SUP] The exact mechanism of action is unknown, but one known effect is that ferroglobulin, a protein in whey, produces oxygen radicals when exposed to sunlight, and contact with these radicals is damaging to the fungus.[SUP][13][/SUP]
The plants also benefit from the calcium in the milk. You are basically foliar feeding the plant calcium while you kill the pm.
Milk has long been popular with home gardeners and small-scale organic growers as a treatment for powdery mildew. Milk is diluted with water (typically 1:10) and sprayed on susceptible plants at the first sign of infection, or as a preventative measure, with repeated weekly application often controlling or eliminating the disease. Studies have shown milk's effectiveness as comparable to some conventional fungicides,[SUP][11][/SUP] and better than benomyl and fenarimol at higher concentrations.[SUP][12][/SUP] Milk has proven effective in treating powdery mildew of summer squash,[SUP][12][/SUP] pumpkins,[SUP][11][/SUP] grapes,[SUP][13][/SUP] and roses.[SUP][13][/SUP] The exact mechanism of action is unknown, but one known effect is that ferroglobulin, a protein in whey, produces oxygen radicals when exposed to sunlight, and contact with these radicals is damaging to the fungus.[SUP][13][/SUP]
SnapsProvolone
Well-Known Member
I would use baking sods before milk. Milk is really gross when it goes off.
Yeah I'm kinda sketch about organics like milk but I'm sketch about fungicide too so idk
Farmer's Hat
Well-Known Member
Either is fine.
SnapsProvolone
Well-Known Member
Just be sure to get all the contaminated vegitation out first. Fans spread the spores compounding the problem. Fans prevent PM they don't stop it.
