Friday, September 12, 2014

Disease risk event from this Monday-Tuesday

I had a meeting and did not able to post it in timely manner, but there was a wet event on Monday-Tuesday this week.  It was 14+ hours of wetness and average was around 60F.  It was a risk event for downy mildew, and very low risk for Botrytis.

Other than a slight chance of rain tomorrow, it looks like we will have a nice cool week! 

For the late season spray recommendations, please refer to previous posts.

http://grapepathology.blogspot.com/2014/08/note-on-sour-rot.html

http://grapepathology.blogspot.com/2014/08/last-stretch-spray-consideration.html

Wednesday, September 3, 2014

Disease risk events from this weekend

A line of rain went through Winchester area resulted in 10 h of wetness with an average of 69F.  It was downy and low Botrytis risk event.  Please refer to the comments on previous posts on late season disease management.

FYI: Our Chardonnay berries are hitting 20-21 Brix and pH is getting near 3.0.  We will see what the forecasted thunderstorms towards the end of this week will do for it...