Biology Reference
In-Depth Information
Discogloeum concentricum (formerly
Exosporium concentricum
).
Leaf Spot
on euony-
mus and ligustrum (privet) in the South.
Exosporium
conidia hyaline, elongate to filiform, one-to
many-septate, straight or curved,
in a slimy
matrix.
Gloeocercospora inconspicua
Leaf Spot
of
highbush and rabbit-eye blueberry. Circular to
angular brownish spots on leaves, with
sporodochia more frequent on upper surface.
These are flat discs when dry, glistening globules
when wet, containing curved, septate conidia.
Gloeocercospora sorghi
Copper Spot
of turf.
(
▶
concentricum (see
Discogloeum concentricum
).
Leaf Spot
on
euonymus and ligustrum (privet) in the South.
▶
Fusicladium
Deuteromycetes, Hyphomycetes
Ramulispora sorghi
).
Mycelium forming a stroma under cuticle of host;
conidiophores dark, short; conidia dark, two-
celled, produced successively as pushed-out
ends of new growing tips. Parasitic on higher
plants, causing scab as well as leaf spots.
Fusicladium pisicola
Black Leaf
of peas, first
reported in Utah in 1921, causing trouble with
canning peas. Spots start as small, irregular whit-
ish areas on undersurface of leaflets and stipules,
but they darken to gray or black from the closely
packed layer of dark conidia. The disease is not
very important.
Fusicladium robiniae
Gloeosporium
▶
Anthracnose
.
Asteroma inconspicuum (formerly
Gloeosporium inconspicuum
).
Elm Leaf Spot
,
Twig Blight
,
Anthracnose
on American and
English elms. Subcircular brown spots with
darker margins and centers are visible on upper
and lower leaf surfaces.
Cryptocline betularum (formerly
Gloeosporium betularum
).
Leaf Spot
,
Anthrac-
nose
of river birch. Spots are more or less circu-
lar, 1/8 inch across, brownish with pale centers
and yellow margins.
Gloeosporium betularum (see
Phaeoisariopsis
robiniae
).
Leaf Spot
,
Seedling Leaf Blight
of
black locust.
Phaeoisariopsis robiniae (formerly
Fusicladium robiniae
).
Leaf Spot
,
Seedling Leaf
Blight
of black locust. Spots are small, with light
centers and dark margins. There is frequently
defoliation of seedlings, sometimes stunting and
death.
(see
▶
Cryptocline
betularum
).
Leaf Spot
,
Anthracnose
of river
birch.
Gloeosporium inconspicuum (see
▶
Asteroma
inconspicuum
).
Elm Leaf Spot
,
Twig Blight
,
Anthracnose
on American and English elms.
Gloeosporium mezerei (see
▶
Gibbago
Marssonina
▶
daphnes
).
Leaf Spot
on daphne.
Gloeosporium rhododendri
Leaf Spot
on rho-
dodendron, tulip-tree.
Gloeosporium ulmicola
Elm Leaf Spot
. Elon-
gated spots on midribs, veins, and margins,
visible on both leaf surfaces.
Marssonina daphnes (formerly
Gloeosporium
mezerei
).
Leaf Spot
on daphne. Small brown
spots on both sides of leaves.
Deuteromycetes, Hyphomycetes
Gibbago trianthemae
Leaf Spot
of horse purs-
lane; a new genus and species, recently described
(1986), with potential for bioherbicide activity.
Gloeocercospora
Deuteromycetes, Hyphomycetes
Glomerella
Sporodochia formed on surface of host above
stomata from hyphae emerging through open-
ings; conidiophores hyaline, simple or branched;
Anthracnose
.
▶
