Neem oil did not work on my powdery mildew

[Flying Goat]

Mad Librettist... Having admired your posts from afar, I'm delighted to have something I can help you with... We have a lot of powdery mildew here on the South Coast...

I spray with unpasteurized goats' milk (find a dairy near you) for my outdoor issues and use baking soda at 2 teaspoons per quart indoors.

The key is to alkalinize the plant surface, as PM must have an acid environment in order to grow...

Cheers.

 

[mad librettist]

oh lol sorry flying goat, it was a trick thread.

the "mildew" was the stipules af a dormant D. scorpiodes misidentified as D. spatulata.

The thread is actually about integrated pest management philosophy. Had I identified positively the pest, I would have given the scorpiodes proper care instead of bashing it with neem oil for having stipules.

I was confused for sure because powdery mildew usually goes away if you breathe on it too hard.

 

[guest2012y]

I was in a CO-OP type store the other day and noticed a bottle that said something about "plant leaf shine".( Neem oil)
I noticed the plants look all shiny after spraying........I do wonder if the oil clogs the stomata (sp?) though? No negative affects so far at my current rate of application.

 

[DARC MIND]

It's misinformation like this that makes me want to throw up.

i can vouch for milk worked on me roses, never had a problem with MJ and i wouldnt use it during flowering

 

[guest2012y]

i can vouch for milk worked on me roses, never had a problem with MJ and i wouldnt use it during flowering

This is one thing I have never done.........I read about it and I see that you do Darc,so I'm tempted to give it a shot. What about the smell..if any?

 

[Clackamas Coot]

and use baking soda at 2 teaspoons per quart indoors.

Use of Baking Soda as a Fungicide

Flying Goat

The normal usage rate for potassium bicarbonate or sodium bicarbonate as a fungicide is 1 tablespoon per gallon of water. You're at 2.66 tablespoons per gallon.

If you're not seeing any damage to the leaves then continue on. My experience was that 1 tablespoon was borderline.

YMMV

CC

 

[DARC MIND]

i dont think it smells,i drink non fat milk so that may help with smell but you want to dilute with water for sure. ther were studies done with impressive results, milk seems to work on PM well.
i think the Lactic bacteria would work better, maybe...you can use that as a foliar or soil drench to help the plant beyond mildew.
i also think foliar spraying in general is a great prevention method, witch would be a IPM approach

 

[mad librettist]

I would try it personally. But I would use powdered milk. maybe it's the lactose.

fucking neem oil and we are worried about milk smelling. neem oil smells!

like bad garlic/onions and some weird cheese and something else I can't describe

 

[ixnay007]

All you're doing with milk, or neem, or any other treatment that is sprayed on the leaves is eliminating the spores, the actual infection is systemic.

 

[mad librettist]

really? all of them?

 

[ixnay007]

Well, I think CC's method of neem seed meal might work.. most of the effective chemical treatments are systemic ones.

Here's something neat..

http://www.springerlink.com/content/q8t5442927102838/

 

[mad librettist]

are we sure foliar neem isn't systemic?

I don't see roots absorbing oil...

 

[guest2012y]

are we sure foliar neem isn't systemic?

I don't see roots absorbing oil...

I feel it may be a little bit. It seems to be absorbed for sure. How effective a foliar application as a systemic treatment is........?????????

 

[mad librettist]

yeah but it's not possible I don't think for oil to be absorbed via roots.

 

[guest2012y]

I would try it personally. But I would use powdered milk. maybe it's the lactose.

fucking neem oil and we are worried about milk smelling. neem oil smells!

like bad garlic/onions and some weird cheese and something else I can't describe

DUDE!!! Neem oil smells great. The kids love it,and the wife says the house smells "clean".
The smell grows on you for sure.......but the overall opinion out here is that it smells good. Sour milk???? That may take a bit more getting used to. But I'll try anything sometimes.

 

[mad librettist]

it's a love it or hate it smell. I don't mind it but i know it is foul.

kinda like durian is foul for some some people. like me.

 

[NUG-JUG]

Neem oil smells like burned peanuts. Not too bad imo

 

[ixnay007]

are we sure foliar neem isn't systemic?

I don't see roots absorbing oil...

I don't think the oil is absorbed, we spray the oil as it's the most effective way to have the active ingredients remain (not dry out out and blow away, or be washed off) externally..

It's a question of active ingredients, and afaik, the meal should provide the same sort of thing.. but probably in a way that the plant can absorb (at least CC's experience seems to support this).

 

[mad librettist]

I though the meal works because it contains residual oil, no?

 

[SilverSurfer_OG]

Good thread.

I just bought some eco-rose spray which is potassium bicarbonate. Some plants falling foul of some bud rot. I think its botrytis.

Have sprayed with some lacto b, and dilute tea tree and lavender essential oil. Not sure if it had any effect.

I also have neem.
Maybe a super spray with the bicarb, neem and milk??

The eco-rose stuff says to add an oil as a sticker so the neem is defo in...

I do believe plants will absorb the neem through roots. I have a seaweed/worm fert that says to add 1 tsp neem oil per litre to make really kick ass.

Cheers!