Best spray for Gray Mold --- to suppress and prevent further spread

hasshoes · July 26, 2009

Long story short. . . some heavy winds and tree branches cracked some of my poles and my bigger tomato plants have been sitting in water since Thursday. I tried to put some plastic under them . . . and then more when the rain stopped. . .and I also went out and sprayed Serenade with molasses in the rain.

Sooooo. . . got them off the ground today. . . but now have gray mold.

I'm sure it's not late blight, thank goodness. But I hope I didn't further spread it by tying my plants up with jute today.

What should I spray? It seems to be only the "big" plants (with maters) have it.

Two years ago I regularly sprayed Serenade on a plant with gray mold and had no success. . . all the tomatoes but one on the plant got it and the whole plant slowly succumbed.

Thanks in advance. . . I'd really like to stop the spread.

dice · July 27, 2009

"manzeb" (this sounds like a generic name to me;
the Mancozeb that Carolyn mentioned in another
thread might be one of these) is the only chemical
control I have seen mentioned in several pages on
botrytis (gray mold):

http://www.negreenhouseupdate.info/i...house-tomatoes

Apparently resistance to commercial fungal controls is common
in botrytis, but on the other hand it has difficulty infecting dry,
undamaged plant tissue. Removing everything that appears
infected is the best course of action, and most controls are
only preventative, not something that will stop an active
infection.

July 26, 2009	#1
hasshoes Tomatovillian™ Join Date: Jan 2007 Location: MT Posts: 438	Best spray for Gray Mold --- to suppress and prevent further spread Long story short. . . some heavy winds and tree branches cracked some of my poles and my bigger tomato plants have been sitting in water since Thursday. I tried to put some plastic under them . . . and then more when the rain stopped. . .and I also went out and sprayed Serenade with molasses in the rain. Sooooo. . . got them off the ground today. . . but now have gray mold. I'm sure it's not late blight, thank goodness. But I hope I didn't further spread it by tying my plants up with jute today. What should I spray? It seems to be only the "big" plants (with maters) have it. Two years ago I regularly sprayed Serenade on a plant with gray mold and had no success. . . all the tomatoes but one on the plant got it and the whole plant slowly succumbed. Thanks in advance. . . I'd really like to stop the spread. __________________ Sara

July 27, 2009	#2
dice Tomatovillian™ Join Date: Jan 2007 Location: PNW Posts: 4,743	"manzeb" (this sounds like a generic name to me; the Mancozeb that Carolyn mentioned in another thread might be one of these) is the only chemical control I have seen mentioned in several pages on botrytis (gray mold): http://www.negreenhouseupdate.info/i...house-tomatoes Apparently resistance to commercial fungal controls is common in botrytis, but on the other hand it has difficulty infecting dry, undamaged plant tissue. Removing everything that appears infected is the best course of action, and most controls are only preventative, not something that will stop an active infection. __________________ -- alias