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Usa

Our monsoon season is coming. Can you imagine a 117 degree day and it's raining outside.
What can I do to protect my plants from powdery mildew?

7/8/2003 5:37:35 AM

Chico, Ca

use systemic fungicides...often

Robert

7/8/2003 9:32:46 AM

In the shade - PDX, OR

Hey Diane - I would wait and see if they stay wet all night long. That is when you will run into problems....
It is so hot there I wouldn't think that you would run into problems w/ PM.

Daconil works great too if you don't want to go systemic.
It seems as if Kelp works wonders to *prevent* PM also.

7/8/2003 1:05:36 PM

Ctpumpkin@optonline.net

Personally & professionally I choose & recommend combining a contact fungicide like Daconil, Mancozeb, or similar with a systemic like Eagle. Contacts are the best for prevention. Systemics (actually local penetrants) are the best for those situations where disease innoculation has already ocurred (though in the beginning we can't see that it has!) & we need a little rescue.

At $365.00 per pound, the absolute best I've ever used is Heritage (ag version is named Quadris). But now that my free samples are all gone, I simply cannot justify this expense right now. But for those who can afford it, this is the best bar none.

When soils are water logged too long, also be on the lookout for soil borne root diseases like Pytophthora. For this, only Aliette, Prodigy, Subdue, Banol, Heritage, etc will work. Though the new off patent Aliette materials like PhytoFos & LESCO-PHYTE will get it done for a whole lot less money.

All else considered, it's hard to beat the cost effectiveness of Mancozeb plus Eagle for Powdery Mildew.

Steve

7/8/2003 9:54:08 PM

Ctpumpkin@optonline.net

OH YEAH!!!

Add a spreader sticker to whatever you use & make sure to cover the UNDERSIDES of the leaves too. That's where PM gets started.

7/8/2003 9:55:15 PM

Usa

I do have the Daconil and will have to check on the rest. Is Daconil systemic?
Robert where did you get your systemic fungicide?
Kelp is really hard to get here for some reason.
I didn't know it started under the leaves.
Thanks a lot for all the information it is appreciated.

7/9/2003 2:25:17 AM

Chico, Ca

We use the "professional" version (it has a different name) of immunox from Spectracide. We got it at a Home depot.
the active ingredient is myclobutinol.

7/9/2003 8:28:13 AM