Biology Reference
In-Depth Information
Fig. 5
Tar Spot of Maple;
black tarry spot on leaf;
section through spot; ascus,
paraphyses, and filiform
ascospores
Pseudoseptoria obtusa (formerly
Selenophorma obtusa
).
Speckle
,
Leaf Blotch
on bluegrass and other grasses. Brown flecks
and frog-eye spots on blades in early spring
enlarge to straw-colored blotches scattered with
minute pycnidia. Spots may drop out, leaving
holes.
Selenophoma donacis; Syn. Pseudoseptoria
everhartii (formerly
S. everhartii
).
Pseudoseptoria obtusa (formerly
S. obtusa
).
Speckle
,
Leaf Blotch
on bluegrass and other
grasses. Brown flecks and frog-eye spots on
blades in early spring enlarge to straw-colored
blotches scattered with minute pycnidia. Spots
may drop out, leaving holes.
Selenophoma everhartii (see
Scolecotrichum
Deuteromycetes, Hyphomycetes
Conidiophores in loose clusters, simple, bearing
conidia on pushed-out ends of successive new
growing points; spores dark, two-celled, ovoid
or oblong, often pointed; parasitic.
Cercosporidium graminis (formerly
Scolecotrichum graminis
).
Brown Stripe
of lawn
grasses,
Streak
of bluegrass and redtop. Grayish
brown to dark linear streaks on leaf blade may
extend into leaf sheath and cause defoliation.
Dark gray masses of conidiophores emerge in
rows through stomata of upper leaf surface.
Scolecotrichum
Pseudoseptoria
everhartii
).
Speckle
,
Leaf Blotch
on bluegrass
and other grasses.
Selenophoma obtusa (see
▶
graminis (see
Cercosporidium graminis
).
Brown Stripe
of
lawn grasses,
Streak
of bluegrass and redtop.
▶
Pseudoseptoria
obtusa
).
Speckle
,
Leaf Blotch
on bluegrass and
other grasses.
▶
Selenophoma
Septocylindrium
Deuteromycetes, Coelomycetes
Deuteromycetes, Coelomycetes
Pycnidia brown, globose, immersed, erumpent,
ostiolate; conidia hyaline, one-celled, bent or
curved, typically crescent-shaped, parasitic.
Pseudoseptoria everhartii (formerly
Selenophoma everhartii
).
Speckle
,
Leaf Blotch
on bluegrass and other grasses. Brown flecks and
frog-eye spots on blades in early spring enlarge to
straw-colored blotches scattered with minute
pycnidia. Spots may drop out, leaving holes.
Conidiophores hyaline, short and simple or lon-
ger and branched, with irregular somewhat
inflated cells; conidia hyaline, two-to several-
celled, in chains that are sometimes branched;
parasitic or saprophytic.
Septocylindrium hydrophylli
Hydrophyllum
Leaf Spot
.
