Biology Reference
In-Depth Information
Cladosporium allii (formerly
Heterosporium
allii
).
Leaf Spot
on onion, leek, shallot, chive,
and garlic; rare in North America. Leaves have
elliptical, depressed, pale brown spots, and
yellow and wither from tip downward.
Cladosporium echinulatum (formerly
Heterosporium echinulatum
).
Fairy Ring Spot
,
Leaf Mold
on carnation, occasional in green-
houses. Bleached spots on leaves have black
spore groups in ring formation. Syringe as little
as possible
Illosporium
Deuteromycetes, Hyphomycetes
Sporodochia cushionlike, light-colored; conidio-
phores hyaline, branched with phialides bearing
conidia apically; spores hyaline, one-celled; par-
asitic or saprophytic, often secondary.
Illosporium malifoliorum
Leaf Spot
of apple
and crabapple.
and on bright days;
control
ventilation.
Cladosporium iridis (formerly
Heterosporium
gracile
).
Leaf Spot
on chlorogalum, daylily,
same as
H. iridis
on iris (conidial state of
Didymellina macrospora
).
Leaf Spot
on iris,
blackberry, lily, freezia, and gladiolus.
Cladosporium variabile (formerly
Heterosporium variabile
).
Leaf Spot
, pinhead
“rust” of spinach, cabbage mold, sometimes
severe in cold, wet weather. Circular, chlorotic
spots with brown or purple margins enlarge and
multiply until they cover most of the leaf, which
turns yellow, withers, dies. There is a greenish
black mold on both leaf surfaces, made up of
large olive conidia, one-to six-celled, covered
with warts. Keep plants growing vigorously in
wall-drained soil.
Heterosporium allii (see
Isariopsis
Deuteromycetes, Hyphomycetes
Dark, synnemata composed of loose conidio-
phores with spores at or near tips; conidia dark
or pale, with two or more cells, cylindrical to
obclavate, often curved; parasitic.
Isariopsis
Phaeoisariopsis
griseda
).
Angular Leaf Spot
,
Pod Spot
of
beans, also sweet pea.
Phaeoisariopsis griseda (formerly
Isariopsis
griseola
).
Angular Leaf Spot
,
Pod Spot
of
beans, also sweet pea. Small, angular brown spots
are so numerous they give a checkerboard appear-
ance to leaves. The fungus forms a gray moldy
covering over dead areas on underside of leaves.
Pod spots are conspicuous when present, black
with red or brown centers, varying from a speck
to the width of the pod. Small, dark synnemata
scattered over the surface bear large conidia, with
two to four cells, at top of stalks. They are probably
wind-disseminated. Control measures are seldom
practical. Also,
Leaf Spot
on kidney bean.
griseola (see
▶
Cladosporium allii
).
Leaf Spot
on onion, leek, shallot, chive, and
garlic; rare in North America.
Heterosporium
▶
echinulatum (see
Cladosporium echinulatum
).
Fairy Ring Spot
,
Leaf Mold
▶
on
carnation,
occasional
in
greenhouses.
Heterosporium
escholtziae (see
Acroconidiella escholtziae
).
Capsule Spot
,
Leaf Spot
,
Stem Spot
of California poppy.
Heterosporium gracile
▶
Cladosporium
iridis
).
Leaf Spot
on chlorogalum, daylily,
same as
H. iridis
on iris (conidial state of
Didymellina macrospora
(
Fig. 3
)).
Leaf Spot
on
iris, blackberry, lily, freezia, and gladiolus.
Heterosporium variabile (see
▶
(see
▶
Kabatia
Deuteromycetes, Coelomycetes
Cladosporium
variabile
).
Leaf Spot
, pin-head “rust” of spinach,
cabbage mold, sometimes severe in cold, wet
weather.
Pycnidia with a radiate shield or scutellum, with
an ostiole; spores two-celled, hyaline, like a tooth
at the apex.
Kabatia lonicerae
Leaf Spot
on honeysuckle.
