Blackspot

Created: 2011-10-31 15:40:38; Last Modified: 2011-10-31 15:40:50
The bane of many a rose gardener, blackspot is a fungus that causes black spots about 1/16 to 1/2 inches in diameter to form on the leaves and sometimes stems. The infected leaves later turn yellow around the spots and eventually fall from the plant. In bad cases, blackspot can severely defoliate a rose bush. Blackspot thrives in warm, humid weather. Rather than constant spraying to control this plague, plant resistant plants and practice good husbandry (sun, water in the morning, burn diseased canes, periodic cleaning of shed leaves, and plant at proper spacing for good air circulation).