Phomopsis cane and leaf spot—Phomopsis
viticola
Leaf blades and veins infected with Phomopsis have tiny dark to brown spots with yellowish margins;
basal leaves may become distorted. On shoots, small spots with black centers are found. Berries may have
light brown to dark spots on them and eventually shrivel and become mummified. Infected canes appear
bleached during the dormant season. Severely affected canes or spurs exhibit an irregular dark brown
to black discoloration intermixed with whitish bleached areas.
Life cycle
Solutions
Phomopsis cane and leaf spot is most serious following a wet spring. However, it is not a serious concern
in home vineyards. Prune out bleached canes during the dormant season. |
Leaf spots with yellowish margins |
Infected
cane |
Scabby
shoots |
|
