North American Fruit Explorers mailing list at ibiblio

["Christopher Mauchline" <mauch1@aol.com>]

Patricia,
   Traditionally fungicides had to be applied *before* there was 
infection (ones like Captan, Ferbam, Mancozeb, etc.) as they provided 
a protective or preventitive effect.  Some of the newer pesticides 
(like "Rubigan" and "Nova") offer some curative effect.  Here's the 
catch:  The newer pesticides tend to be expensive and are often 
restricted use (meaning you'd have to have some sort of spraying 
license (I have a private applicators license, which means I can 
spray plants on land I own or rent, but I can't spray for others for 
money (which requires a commercial applicators license and more 
restrictions)).  I don't know what the laws are in CA.  or how bad 
your case of PM is.  I.e. usually by the time you've seen the 
symptoms its too late.  Although spraying might prevent PM on 
uninfected bunches or on your other grapes if you have another 
infection period.  

I could refer you to the same site I mentioned that has a spray 
schedule, but given CA's different climate and laws, you might want 
to see if CA has an extension service and offers information.

Chris Mauchline
SE PA, zone 6

--- In nafex@egroups.com, PRishel826@a... wrote:
> Hi all, while we're on grapes here...my French Columbard vine has 
developed a 
> severe case of powdery mildew...all of my American varieties are 
untouched 
> (obviously, I guess), as are my other viniferas...only the 
Columbard (fruit 
> included, it seems) has it.  Does anyone have any spray suggestions 
for me 
> that might check the pm?  I'd be grateful.  Thanks so much, 
Patricia Rishel  
> Los Angeles  USDA Zone 11


------------------------------------------------------------------------
22,345,678 matches to your search term?
Inforocket.com is the fast way to the right answer - guaranteed.
http://click.egroups.com/1/4521/0/_/423498/_/959794162/
------------------------------------------------------------------------