| AFFECTING LEAVES: |
|
CONDITION
|
CAUSE
|
 |
White
flecks in leaves |
Rose leafhoppers
(Edwardsiana rosae) or Twospotted
spider mite
|
|
White
powdery material on upper or lower surface of leaf |
Powdery mildew
(Mycosphaerella sp.)
|
|
Leaves
puckered, often thickened and discolored |
Currant aphid (Amphorophora
agathonica Hottes or Cryptomyzus ribis)
|
|
Leaves
chewed |
Imported currantworm
(Nematus ribesi) or Western
tent caterpillar (Malacosoma californicum)
|
|
Hollow
swelling in leaves |
Gall-making sawfly
|
|
Orange
to yellow colored spots on underside of leaf |
Leaf rusts (various species)
|
|
| AFFECTING TWIGS AND SMALLER BRANCHES: |
|
CONDITION
|
CAUSE
|
|
Tunneling
in stems or branches |
Current borer (Synanthedon
tipuliformis) or Bronze cane
borer (Agrilus aurichaleceus)
|
|
| AFFECTING FRUIT: |
|
CONDITION
|
CAUSE
|
|
Maggot
in fruit |
Currant fruit fly
(Epochra canadensis)
|
