Biology Reference
In-Depth Information
one-celled, cylindrical or log, spindle-shapped,
mostly bent.
Phlyctema vagabunda (formerly
Gloeosporium allantosporum
).
Anthracnose
,
Dieback
on raspberry in Oregon, Washington.
See
crescent-shaped conidia are formed in moist,
flesh-colored masses in center of spots. In severe
infections there is progressive defoliation from
below upward.
Other occasional symptoms are black,
sunken spots on leaf stalks, light brown to
pale yellow lesions on canes, and black
flyspeck spots on green berries, with considerable
reduction in yield. Apothecia are formed
on fallen leaves; ascospores are forcibly
discharged in spring and carried by wind to
young leaves.
Control
Clean up and burn old leaves under the
bushes. Spray with bordeaux mixture (preferred
to the newer organics) shortly after leaves
appear (about 3 weeks after blossoming) and
immediately after picking.
Elsinoe¨ veneta
under Spot Anthracnose for
the common raspberry disease called anthracnose.
▶
Pseudopeziza
Ascomycetes, Helotiales
Apothecia brown, cup-shaped, arising from
leaves on short stalks, not setose, paraphyses
present; spores one-celled, hyaline, ovoid.
Drepanopeziza ribis (formerly
Pseudopeziza
ribis
).
Current Anthracnose
,
Leaf
,
Stem and
Fruit Spot
generally distributed on currant,
flowering currant, and gooseberry, first
reported on black currants in Connecticut in
1873. Very small, brown, circular spots
appear first on lower, older leaves, which turn
yellow if
Include a good
spreader
and
cover
both
leaf
surfaces
thoroughly.
Pseudopeziza
Drepanopeziza
ribis
).
Current Anthracnose
,
Leaf
,
Stem and
Fruit Spot
generally distributed on currant,
flowering currant, and gooseberry, first reported
on black currants in Connecticut in 1873.
ribis (see
▶
spots
are
numerous. Hyaline,
