| AFFECTING LEAVES: |
|
.................CONDITION.................
|
CAUSE |
|
New
leaves and shoots have a powdery
appearance. Later,
light brown to orange pinhead-sized balls form
within the mass of white growth. These tiny dots mature and turn a
black color. These black structures are the overwintering stage. |
|
Helen
Atthowe, Missoula County Extension
|
Leaves on
infected plants are uniformly small, dark green, crinkled, and tightly
curled downward and inward. When diseased shoots first appear, they are
pale yellowish-green, but they soon turn dark green, become stiff and
brittle, and usually do not branch.Plant lose vigor each year. Berries
on infected plants may ripen prematurely and are small, dry, seedy, and
crumbly.
Infected plants should
be destroyed immediately. |
Raspberry
Leaf Curl Virus
|
|
| AFFECTING TWIGS AND SMALLER BRANCHES: |
|
CONDITION |
CAUSE |
Missoula County Extension Service
|
Larvae
bore many
tunnels in canes and the crown may be
extensively damaged |
|
|
| AFFECTING ROOTS AND GROUND LINE AREA: |
|
CONDITION |
CAUSE |
|
The most
obvious symptoms of root rot are stunted, yellowing leaves,
premature fall coloration and leaf drop, and twig and branch dieback.
By the time the foliar symptoms develop, the rot canker may extend
halfway or more around the stem of the plant. In early stages, the
diseased bark is firm and intact while the inner bark is slimy and may
produce a moist, gummy exudate.
|
|
|
| AFFECTING FRUIT: |
|
CONDITION |
CAUSE |
Maggie Heide Missoula County
Extension
|
Worm
Like grubs inside raspberries
Prune out old canes as soon as they fruit and cultivate around plants
The
adults cause characteristic slits in the leaves from their feeding and
destroy developing buds.
The larvae feed within the blossoms and inside
developing fruit. |
Western
Raspberry Fruitworm
|
|
| AFFECTING THE WHOLE PLANT: |
|
CONDITION |
CAUSE |
|
Foliar
symptoms typically include wilting, curling, yellowing, marginal or
interveinal browning or death. Often these symptoms may look like water
stress and can occur on only one side of the plant. Other symptoms may
include dieback of branches or a portion of the plant. Furthermore,
wood under the bark may exhibit discolored streaks or bands. The color
of the streaks can range from light tan to grayish olive to
brownish-black. Yellowing and defoliation often progress upward. |
|
Helen Atthowe,
Missoula County Extension |
Brown, irregular, blotchy area that expands
between leaf
veins.
Black, sunken spots develop on fruits, leaves, and stems of
vegetables. |
|
