Is this Powdery Mildew?

I have these pictures of some white fuzziness I found on a few small plants. They're all about 1month old and I've only noticed it on the lower leaves. I think it's powdery mildew but not sure. Hope the pics are good enough for you all to tell. If not, I'll try and get more HiDef.

I'm also not ruling out it could be something else like residue from a foliar spray I did.

So far I've given them a foliar spray with "Einstein (Neem) oil" and a foliar nutrient spray of some new stuff I haven't used before from Blue Mountain Organics.

If it is powdery mildew, I've read a sulfur burn is the best solution but i've also read other methods for combating it like milk/water or baking soda/water mix.

Any recommendations or expert diagnosis would be greatly appreciated.

Room conditions are
600W HPS on 18 off 6 hrs/day
72-83 deg F
30% or so humidity (it's all I can get in this dry climate)
Plenty of ventilation & circulation throughout the room


Thanks

That looks like Nute spray residue . thats what may have caused those burn spots

ronaldino said:

I have these pictures of some white fuzziness I found on a few small plants. They're all about 1month old and I've only noticed it on the lower leaves. I think it's powdery mildew but not sure. Hope the pics are good enough for you all to tell. If not, I'll try and get more HiDef.

I'm also not ruling out it could be something else like residue from a foliar spray I did.

So far I've given them a foliar spray with "Einstein (Neem) oil" and a foliar nutrient spray of some new stuff I haven't used before from Blue Mountain Organics.

If it is powdery mildew, I've read a sulfur burn is the best solution but i've also read other methods for combating it like milk/water or baking soda/water mix.

Any recommendations or expert diagnosis would be greatly appreciated.

Thanks

Click to expand...

I suspect it residue from the foliar sprays you're using, but it may be mildew. Test your remedy on a few leaves before treating the entire plant.

Here's some expert advice for you:

Organic Sprays
Sulfur is highly effective against powdery mildew if used in a protectant program with a minimum of 7 to 14 days between applications. Garlic naturally contains high levels of sulfur and a few cloves crushed in water can be used to make a homemade spray. Apply a sulfur-based fungicide at first evidence of mildew and repeat applications as necessary. Proper timing of fungicide applications is critical to successful control so make sure to begin at the first sign of the disease.
However, sulfur can be damaging to some squash and melon varieties. Another option is to spray once a week with a solution of baking soda. Baking soda increases the surface pH of the leaf making it unsuitable for the growth of powdery mildew spores. Be sure to spray the undersides of leaves as well as the upper surfaces when using any of these sprays.
Here's a recipe to make your own spray:
1 teaspoon baking soda
1 quart water
A few drops of liquid soap
Before treating your plants, test the spray on a few leaves to make sure they are not too sensitive.

Thanks a lot guys! I was wondering if it was or not b/c from what I was reading, powdery mildew thrives in conditions of high humidity and my room is constantly low humidity.

naw dont look like mildew to me..

yes it looks like powdery mildew at the beginning stages plus maybe thrips a silver look on leaves , check underneath with a pocket-micro scope for larva or adults ...if your humidity level is 55 or under u shouldn't have this problem i have just suffered from powdery mildew now because i wanted to cut down electric cost by not running my dehumidifier but now paying for it big time