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 ?
Generally, it is reasonably free of black rot and Botrytis cinerea fruit rot, but is more affected by Phomopsis viticola, which causes Phomopsis cane and leaf spot, and can lead to fruit rot.
PHOTO : Cranberry half at right has black rot caused by a fungus.
Growers need to remember that not every black dot is phomopsis, and not every rot is black rot.
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.
Cylindrocladium black rot (caused by Cylindrocladium parasiticum Crous, Wingfield & Alfenas), leafhoppers (Empoasca fabae Harris), and/or leaf scorch (caused by Leptosphaerulina crassiasca Sachet).
Black Rot has hit 1,000 acres of cabbage and sprout plantations in the south east of Ireland.
The early vines have seen modest infections of powdery mildew and black rot, but seem to be almost phylloxera-free, with no downy mildew observed.
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.
It also has moderate to high levels of resistance to Cercospora arachidicola Hori, but is highly susceptible to southern stem rot (caused by Sclerotium rolfsii Sacc) and to Cylindrocladium black rot [caused by Cylindrocladium parasiticum Crous, Wingfield, & Alfenas; syn.