Biology Reference
In-Depth Information
Cryptostictis
Seimatosporium
arbuti
).
Leaf Spot
on
Arbutus menziesii,
Manzanita
, ledum.
Seimatosporium arbuti (formerly
Cryptostictis
arbuti
).
Leaf Spot
on
Arbutus menziesii,
Manzanita
, ledum.
arbuti (see
Cylindrosporium betulae
Brown Leaf Spot
of
Birch. Sometimes serious enough to defoliate but
not often present on ornamental trees.
Cylindrosporium chrysanthemi
Chry-
santhemum Leaf Spot
. Spots are dark brown
with yellowish margins, increasing to take in the
whole leaf, which hangs down. Similar to more
common Septoria leaf spot.
Cylindrosporium clematidinis
Clematis Leaf
Spot
. Reddish brown spots on lower leaves,
which may drop. Dusting with sulfur has been
suggested.
Cylindrosporium salicinum
Willow Leaf Spot
.
Sometimes causing defoliation; can be controlled
with bordeaux mixture if necessary.
Cylindrosporium sp.
Leaf Spot
on spirea,
recorded from a Kansas nursery. Light yellow
lesions turn dark brown, with masses of yellow
conidia on underside.
▶
Cycloconium
Deuteromycetes, Hyphomycetes
Mycelium coiled, spores small, dark, two-celled;
scarcely different from short hyphae.
Cycloconium oleaginum
Olive Leaf Spot
,
Peacock Spot
,
Ring Spot
. Blackish, more or less
concentric rings on leaves, especially those weak-
ened or old.
Cylindrocladium
Deuteromycetes, Hyphomycetes
Cytospora
Conidiophores repeatedly dichotomously or tri-
chotomously branched, each terminating in two
or three phialides (cells developing spores);
conidia hyaline, with two or more cells, cylindri-
cal, borne singly; parasitic or saprophytic.
Cylindrocladium avesiculatum
Leaf Spot
and
Twig Dieback
on holly, and
Leucothoe
¨
sp.
Cylindrocladium colhounii
Leaf Spot
on bottle-
brush (Callistemon).
Cylindrocladium clavatum
Leaf
Cankers and Diebacks
.
Cytospora sp.
Leaf Spot
on mulberry.
▶
Dactylaria
Dactylaria higginsii
Leaf Spot
on nutsedge.
Spot
on
Dichotomophthoropsis
bottle-brush (Callistemon).
Cylindrocladiumpteridis
Leaf Spot
,
Leaf Blight
of Washington palm. Numerous small dark brown
spots with light margins are somewhat disfiguring.
Cylindrocladium pteridis
Fern Leaf Spot
,
Leaf
Blotch
. Reddish brown lesions run together to
cover large areas. Pick off and burn infected fronds.
Deuteromycetes, Hyphomycetes
Dichotomophthoropsis nymphaearum
Leaf
Spot
on water-lily, and water shield.
Cylindrosporium
Didymaria
Deuteromycetes, Coelomycetes
Deuteromycetes, Hyphomycetes
Acervuli subepidermal, white or pale; conidio-
phores short, simple; conidia hyaline, filiform,
straight or curved, one-celled or septate; parasitic
on leaves.
Conidiophores simple, arising from leaf
surface in loose groups; conidia hyaline, two-
celled, ovate-oblong, borne singly; parasitic on
leaves.
