[Sleepy]

i had success with Serenade...its OMRI, also.

for walls and hard surfaces, i use a diluted bleach solution.

i pput a dehumidifier in the grow last year, my RH is always in control now.

[Citizen024]

The problem with using Organicide and other oils is that they don't really take it out, they just smother it down. It comes back usually, and because you have used oil, you now cannot use one of the most effective treatments: sulphur. Sulphur will severly burn plants if you have used any oils in the last 30 days.

Organicide/oils maybe fine in veg, but not in flower. Sulpher and Zone/Penetrator in my opinion are the best options till about week 4-5. With milk being good for late flowering when you just want to hold it down without damaging anything.

[kmk420kali]

I sprayed 200 plants with freaking Organicide (For whiteflys), a month ago....(Not my choice by a long shot!! I work for someone else, they call the shots) but I had to throw away all the clothes and shoes I wore...the place smelled like a fishery!!

[rambam]

From the Journal of General Plant Pathology, sometime in 2004: From 1996 to 1997, potassium silicate (SiO2) was tested at 0, 25, 50, and 100 mg l−1 in hydroponics to control powdery mildew. Other elements were added in the usual amounts, and the strawberries were cultivated hydroponically in a greenhouse for 4 months (from October to January). The powdery mildew spread in the control plot, but little mildew developed in the plot with 25 mg l−1 silicate, and none in plots with more than 50 mg l−1 silicate. The suppressive effect lasted for about 4 months on fruits and even longer on leaves. On analysis of mineral content in the leaves, only the silicate content differed markedly between the control and treated plants. Nitrogen, phosphate, potassium, and calcium contents did not differ greatly. The maximum silicate content was about 24 times that of the control, and disease severity decreased significantly when the content was more than 1.5% in the leaves. The hardness of the strawberry leaves, measured by a creep meter, was increased by the silicate treatment.

[rambam]

The above is quoted to support Sarek's earlier suggestion about potassium silicate as a prophylactic protecting against powdery mildew. Maybe this could be combined with the other methods to control throughout veg and flower. I have heard how successful the zone + penetrator solution has been, but doesn't it contain chlorine? I wonder if it would affect taste if used too late in flower...

[Bumble Buddy]

Chimera made a post about Actually Killing PM. (link)

[Nughit]

I made the mistake of using Organocide. My room smelt like stinky fish stir fry for 2 weeks. That shit stinks. Stick with the neem oil if you're going to use a oil spray.

Originally Posted by Frozenguy

Organocide is the best product I've used for PM and it also kills fungas gnats, spider mites and 23 other insects. Its omri organic and is 92% edible fish oil, 5% seaseme oil, 3% lecithin.
Diluted to 2oz/gallon and it kills/prevents pm in any stage and is perfectly fine for the plants and your home. It does smell for a little, but its so safe you can use it close to harvest.

Can be bought at home depot or online

https://www.hydroponicsoutlet.com/Org...t-p/org705.htm

[fyahfohigha]

Does anyone know about using Dutch Master Zone/Penetrator? I have heard you can dunk to totally eradicate PM from the plant, or as a spray to keep it down (even late into flower!?). Spraying is the only affordable option unless you cut back on the penetrator. How late can you use that mix into flower without it being a problem for your health, or is it a problem?
Also how late can you use Einstein Neem oil into flower?
Should you rinse to take off either of these residues?
PM IS THE DEVIL!!!!

[Weedhound]

I prefer Serenade. DM Zone has chloramine in it. I add it to my water for bug issues.

[THC123]

for PM apart from a sulfur burner(outdoors) there is one thing that works pretty well = prevention prevention prevention.


I treat my whole garden(not just the MJ) 2 times per season with anti mildew product , the MJ plants get their last treatment about a month before flowering begins.


I always used to have PM but that is over now