Here’s some of downy mildew symptoms (on Vidal).
1) On upper leaf
2) Underside close-up
3) On young berries
4) Up-close and personal
You can find more pictures of downy mildew (and other diseases) from the link listed on the left-hand side of this blog. Click on a disease name of your interest, and it will bring up past posts about the disease.
Mizuho,
We operate a small family vineyard in Frederick County, Maryland. Your blogs are great – very informative. Here is the link to our blog: http://cabbagerunvineyards.wordpress.com. We are working hard against BR and DM this year as well.
Bob Marshall (marshall@aws.com)
Thanks, Bob for your comments. Good luck with your fight against BR and DM!