VASCM: Resistance management strategy

[Bradley Brown]

Jim,
If you have mildew, completely soak the vines with Kaligreen then Oxidate one week apart, and include 4 lbs/acre MicroThiol sulfur both times. These contact fungicides will take care of the problem and allow you to get back on a normal schedule. 

Bradley Brown
Winemaker & Proprietor
Big Basin Vineyards

On May 27, 2013, at 6:40 PM, "Ed Muns" <ed at munsvineyard.com> wrote:

> I start the season with Stylet Oil and Kaligreen and then alternate through
> 4-5 different synthetic classes for the rest of the year.  No fungicide
> class is used more than twice to minimize resistance build-up.  I never
> spray the same material successively and try to maximize the spray cycles
> between the same material.  Perhaps overly conservative, but this is serious
> business for the serious grape grower.
> 
> As far as I know Stylet Oil doesn't build up a resistance so much as the
> issue being that it must be used every 7-10 days and most people aren't that
> diligent.  The interval for any fungicide depends on the temperature and
> attendant disease pressure, so intervals can be slightly varied on this
> basis.  But, in my experience, you can seldom get away with longer intervals
> than the label recommendation ... and, that assumes your spray equipment and
> canopy management allows adequate application to all parts of the vine.
> 
> Regards,
> Ed
> ------------------------------------------------------------------
> Ed Muns
> Muns Vineyard - www.munsvineyard.com
> Facebook - www.facebook.com/munsvineyard
> 
> 
> 
>> -----Original Message-----
>> From: vascm-bounces at kkn.net [mailto:vascm-bounces at kkn.net] On 
>> Behalf Of Jim Varano
>> Sent: Monday, May 27, 2013 4:58 PM
>> To: vascm at kkn.net
>> Subject: VASCM: Resistance management strategy
>> 
>> Dear Members, I have been a bad boy and haven't sprayed as 
>> much as I should have in the Past 4 years as my small 
>> vineyard was getting established . Now it seems I have a very 
>> bad case of Powdery Mildew that is reeking havoc on some of my vines.
>> I have started a spray schedule this year... I have done 2 
>> sprays of Stylet Oil @ 1.5 %.
>> 
>> I was under the impression that you can spray 3 times with 
>> one product then switch to another for 3 sprays then go back 
>> to your original ..... But my memory fails me....
>> 
>> So......what do you folks do for a resistance management 
>> strategy ? What products and time intervals?
>> I plan on spraying this Thursday weather permitting...so I 
>> have time to get what's needed.
>> 
>> Now I know if you ask 10 people you might get 10 
>> answers...but there might be a common thread. And I know I 
>> could hire an outside consultant...but I believe that this 
>> forum and it's members expertise can help...If I totally 
>> botch it,I can save my pennies to hire someone.
>> 
>> Thanks in advance for your help 
>> 
>> Novice
>> Jimmi Varano
>> Spider Mountain Vineyards
>> Boulder Creek
>> 
>> Sent from my iPad
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