Been battling black rot for years now and can’t get it under control. Wind up losing half or more of my grapes.
My current spray program-
May 15, Captan (dry) .4 oz/ gal.
May 29, Daconcil (liq) 2 tbs./ gal.
June 6, Captan .5 oz per gal.
June 15, Daconcil 2 tbs. / gal...