Biology Reference
In-Depth Information
Kabatia periclymeni (formerly
Leptothyrium
periclymeni
).
Lasiobotrys
Leaf
Spot
on
honeysuckle,
widespread.
Leptothyrium californicum
Leaf Spot
on coast
live oak.
Leptothyrium
Ascomycetes, Dothideales
Perithecia in a ring around a sclerotial stroma;
spores dark, two-celled.
Lasiobotrys lonicerae
Leaf Spot
on honey-
suckle. Spot is well-marked with small, dark,
wartlike stromas.
dryinum (see
Tubakia
▶
dryina
).
Leaf Spot
on white oak.
Leptothyrium periclymeni (see
Kabatia
periclymeni
).
Leaf Spot
on hon eysuckle,
widespread.
Tubakia
▶
dryina (formerly
Leptothyrium
dryinum
).
Leaf Spot
on white oak.
Leptostromella
Deuteromycetes, Coelomycetes
Linospora
Pycnidia elongate, with a cleft; separate; spores
filiform, with rounded ends, hyaline, continuous
to septate on simple conidiophores.
Leptostromella elastica
Leaf Spot
of rubber-
plant. The symptoms appear in spots and
streaks, but infection spreads until the entire
leaf is involved. Black lines outline spots in
which small black pycnidia produce long,
colorless spores. Remove and burn infected
leaves.
Ascomycetes, Diaporthales
Perithecia innate, beak often lateral, with
a shield; paraphyses lacking; spores spindle-
shaped to filiform, hyaline.
Linospora gleditschiae
Leaf Spot
,
Tar Spot
on
honey locust in the South. Numerous black
fruiting bodies are formed on undersurface of
leaves.
Leptothyrella
Lophodermium
Deuteromycetes, Coelomycetes
Ascomycetes, Rhytismatales
Pycnidia with a radiate shield, separate; spores
2-celled, hyaline.
Leptothyrella liquidambaris
Fruiting body a hysterothecium, midway between
an elongated perithecium and a compressed apo-
thecium, hard, black, opening with a long narrow
slit; paraphyses present; hooked at tip; spores
filiform, septate or continuous. Most species
cause needle casts.
Lophodermium schweinitzii
Rhododendron
Leaf Spot
. Large silvery white spots with red,
raised margins have very prominent oval, black
fruiting bodies on the upper surface. Lower side
of spots is a light chocolate brown. Infected por-
tions may fall out, leaving irregular holes. The
disease is more common on native than on hybrid
varieties.
(see
Tubakia
▶
dryina
).
Leaf Spot
red on sweetgum.
Tubakia dryina (formerly
Leptothyrella
liquidambaris
).
Leaf Spot
red on sweetgum.
Leptothyrium
Deuteromycetes, Coelomycetes
Pycnidium flattened with a more or less radiate
shield, opening with a ostiole; spores one-celled,
hyaline, on simple conidiophores.
