Black Rot


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black rot

[′blak ‚rät]
(plant pathology)
Any fungal or bacterial disease of plants characterized by dark brown discoloration and decay of a plant part.

Black Rot

 

a grapevine rot, which mainly infects the grapes (occasionally the shoots and leaves); at first small brown spots appear, soon growing larger. The grapes shrivel and become almost black, shot with a bluish color; they become covered with black knobs. The disease appears after prolonged cold rains. A few pathogenes of black rot are known, the most dangerous of which is the ascomycetes Guignardia baccae. The method of fighting black rot is to spray the vines with bordeaux mixture, a pesticide.

References in periodicals archive ?
While many foliar fungal diseases were less of an issue due to the lack of rainfall, black rot was severe in the Hill Country.
destructans was the only microorganism consistently isolated from the seedlings experimentally infected, which demonstrates that it is the cause of black rot on the roots and crown of blackberry, R.
"Black rot infects fruit and spreads during water harvest, which is about 2 months after the last application of fungicide," Stretch explains.
Trials also showed the cultivar to be moderately resistant to powdery mildew, Botrytis bunch rot and black rot. The foliage can be affected by downy mildew, but standard commercial spraying can control this issue.
Activity evaluation of abiotic resistance inducers, chemical fungicide and natural plant extracts on black rot of pineapple, cv.
Mildew, a whitish mold, and black rot can also attack miniature roses.
Preliminary field trials also shows Georgia-01R to have moderate resistance to white mold or stem rot (caused by Sclerotium rolfsii Sacc.), Cylindrocladium black rot (caused by Cylindrocladium parasiticum Crous, Wingfield & Alfenas), leafhoppers (Empoasca fabae Harris), and/or leaf scorch (caused by Leptosphaerulina crassiasca Sachet).
A: Black rot is a fungus disease that affects grapes (along with powdery and downy mildew).
Black Rot has hit 1,000 acres of cabbage and sprout plantations in the south east of Ireland.
"The grower didn't think it was black rot," Volenberg said.
The objective of this study was to evaluate the severity of black rot crater rot Sclerotinia rot and soft rot on the roots of carrots cv.