Biology Reference
In-Depth Information
Use healthy seed grown in arid states; clean up
plant refuse; rotate with non-legumes.
Colletotrichum violae-tricoloris (
Gloeosporium
Glomerella
cingulata
). (possibly identical with
G.
piperatum
).
Eggplant Anthracnose
,
Ripe Rot
,
an occasional trouble.
Gloeosporium
melongenae (
▶
Glomerella
cingulata
).
Anthracnose
of violet, pansy.
Colletotrichum sp.
Azalea Anthracnose
.New
disease serious on Indian and Kurume azaleas
in Louisiana since 1954. Very small rusty
brown spots appear on both surfaces of
young leaves, followed by defoliation. Spores
appear on fallen leaves, which serve as
source of inoculum for the next season. Cop-
per and organic fungicides are effective in
control.
▶
Glomerella
cingulata
).
Pepper Anthracnose
,
Fruit Spot
,
sometimes a leaf and stem spot but more often
a disease of green or ripe fruit.
Gloeosporium
piperatum (
▶
quercinum (Telemorph,
Apiognomonia errabunda
).
Oak Anthracnose
.
See
▶
▶
Discula umbrinella
and
Fig. 2
.
Gloeosporium thuemenii f. sp. tulipi
Tulip
Anthracnose
found in California in 1939.
Lesions on peduncles and leaf blades of Darwin
tulips are small to large, elliptical, first water-
soaked then dry with black margins and numer-
ous black acervuli in center of spots.
Gloeosporium sp
Peony Anthracnose
on
stems, leaves, flowers, petals of peony. Stem
lesions are sunken, with pink spore pustules,
and may completely girdle the stalks, causing
death of plants. Also a destructive anthracnose
on strawberry.
Discula
▶
Blights
.
Discula campestris
Anthracnose
on maple.
Discula destructive
Anthracnose
on dogwood.
Discula fraxinea (Teleomorph, Gnomoniella
fraxini).
Anthracnose
on ash.
Gloeosporium
Glomerella
Deuteromycetes, Coleomycetes
Ascomycetes, Phyllachorales
Perithecia are dark, hard, carbonaceous, usu-
ally beaked, immersed in substratum so only the
neck protudes. Ascospores are hyaline, one-
celled; asci are thickened at tips, inoperculate
but spores sometimes discharged with force;
paraphyses present.
Glomerella cingulata (formerly
Colletotrichum violae-tricoloris
).
Anthracnose
of violet, pansy. Circular dead spots with black
margins, sometimes zonate, appear on leaves;
flowers have petals spotted or not fully developed
and producing no seed; entire plants are some-
times killed. Remove and burn infected plants or
parts; clean up old leaves in fall. Copper sprays
may be injurious.
Glomerella cingulata (formerly
Colletotrichum gloeosporioides
).
Anthracnose
,
Canker
,
Dieback
,
Withertip
,
Fruit Rot
of a great
many plants, generally distributed except on the
Pacific Coast, more common in the South.
Genus characters are about the same as for
Colletotrichum
except that there are no setae
around the acervuli. Conidia are hyaline, one-
celled, appearing in masses or pustules on leaves
or fruit. Leaf spots are usually light brown, with
foliage appearing scorched.
Gloeosporium allantosporum (
Phlyctema
vagabunda
).
Anthracnose
,
Dieback
on raspberry
in Oregon, Washington.
Gloeosporium
▶
Glomerella
cingulata
).
Maple Anthracnose
,
Leaf Blight
,an
important leaf disease of silver maple, common
also on other maples and boxelder, appearing
from late May to August.
Gloeosporium aridum (Discula fraxinea)
Anthracnose
on ash.
Gloeosporium
apocryptum (
▶
Glomerella
cingulata
).
Lime Anthracnose
,
Withertip
, only
on lime in southern Florida.
limetticolum (
▶
