ROSE ROSETTE ON ROSE PLANT
CAUSAL ORGANISM:
This "disease" appears to be vectored by a blister mite but the causal agent has not been identified. Some plant pathologists think that it is a ...
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ROSE SPRING DWARF DISEASE
ROSE SPRING DWARF DISEASE
CAUSAL ORGANISM:
A virus is suspected in causing this disease.
SYMPTOMS:
Rose mosaic usually appears in spring as a distortion of growing tips or expanding leav...
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ROSE MOSAIC
ROSE MOSAIC ON ROSE PLANT
CAUSAL ORGANISM:
Prunus Necrotic Ringspot Virus: Mosaic is probably the most commonly found virus on roses but many other virus diseases also exist. While mosaic is
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BACTERIAL CROWN GALL
BACTERIAL CROWN GALL ON ROSE PLANT
CAUSAL ORGANISM:
Agrobacterium spp: This is really the only serious bacterial disease of Rose. The bacteria is found world wide wherever roses are grown a...
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ROSE CANKERS
ROSE CANKERS ON ROSE PLANT
CAUSAL ORGANISM:
Coniothyrium spp: After a long cold wet winter, roses can be expected to have some dead and cankered canes. While these pathogenic fungi are not ve
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BOTRYTIS BLIGHT
BOTRYTIS BLIGHT ON ROSE PLANT
CAUSAL ORGANISM:
Botrytis cinerea: Botrytis blight is common in all parts of the world. This fungus is not a specific pathogen and can take advantage of many s...
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ANTHRACNOSE
ANTHRACNOSE ON ROSE PLANT
CAUSAL ORGANISM:
Sphaceloma rosarum: Not much is known about this disease, however, it can be severe under cool moist spring conditions. Wild rose, climbers and r
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DOWNY MILDEW
DOWNY MILDEW ON ROSE PLANT
CAUSAL ORGANISM:
Peronospora sparsa: Downy Mildew is a very common disease of roses which occurs under moist cloudy conditions. The disease is found throughout th
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