Possible Problems of Blackberries
Symptoms Probable Cause
Leaves wrinkled or curled; discolored, stunted, tend to fall off - Aphids
Small holes in canes surrounded by sawdust - Borers
Very young canes cut off at soil level - Cutworms
Small misshapen fruits - Larvae Of Fruit Flies
Holes in leaves - Japanese Beetles
Foliage yellowed or white mottling, glaze of honeydew; plant weakens - Leafhoppers
Holes in fruit; leaves rolled up - Leafrollers
Leaves yellowed and may (drop)- Psyllids
Plants grow slowly; stunted; edge of leaves chewed - Root Weevils
Weaken plant, stunting growth, fewer blooms and fruit. - Sawflies
Leaves yellow, drop; bumps on leaves and stems; sometimes sticky material on leaves - Scale
Leaves stippled, yellow, dirty; webbing on interior canes - Spider Mites
Leaves discolored; black fecal spots on underside of leaf. - Thrips
Weakened plant, leaves yellowed, appears like flying dandruff when foliage disturbed - Whiteflies
Stem tips die; oval spots with purple edges, gray centers on canes - Anthracnose, A Fungal Disease
Areas between veins turn yellow, then brown; lower surface of leaves are covered with white, purple or black hairy growth. - Downy Mildew, A Fungal Disease
Soft, watery spots appear on stems, leaves or fruit; fuzzy white or gray mold forms. - Gray Mold, A Fungal Disease
White spots on leaves; eventually entire leaf is covered with powder - Powdery Mildew, A Fungal Disease
Orange or brown pustules on leaves - Rust , A Fungal Disease
Yellowing of foliage and gradual defoliation; plants may become stunted - Verticillium Wilt, A Fungal Disease
Fruit missing; purple bird manure on property - Birds
Plants disappear all or in part; growing cane tips chewed off - Deer
Young canes disappear all or in part; - Rabbits