Biology Reference
In-Depth Information
Lentinus
Leptosphaeria
Basidiomycetes, Agaricales
Blights
.
Leptosphaeria korrae
Root and Crown Rot
of
turf grasses (necrotic ring spot).
▶
Gills are notched or serrate at edge, decurrent,
stipe often lateral or lacking cap, tough-fleshy to
leathery; spores white.
Lentinus lepideus (see
Macrophoma
Neolentinus lepideus
).
Scaly Cap
, causing a brown cubial rot of conifer-
ous wood and sometimes decaying heartwood of
living pines.
Lentinus tigrinus
Sapwood Rot
, white
mottled butt rot of living hardwoods, commonly
associated with fire scars and one of the most
important decay fungi in the Mississippi
Delta. Fruiting body is white with cap depressed
in center, more or less covered with blackish
brown hairy scales, rarely developing on living
trees.
Neolentinus lepideus (formerly
Lentinus
lepideus
).
Scaly Cap
, causing a brown cubial rot
of coniferous wood and sometimes decaying
heartwood of living pines.
▶
Macrophoma sp.
Fruit Rot
of grape.
Macrophomina
Deuteromycetes, Coelomycetes
Spores hyaline, one-celled, in pycnidia.
Macrophomina phaseolina (Anamorph,
Scle-
rotium
or
Rhizoctonia bataticola
).
Charcoal Rot
,
Ashy Stem Blight
,onmanyplantsinwarm
climates and sometimes in temperate zones.
The name for the sterile stage comes from
sweet potato, and the term charcoal rot is
used because the interior of the potato becomes
jet black.
The fungus lives in the soil, is particularly
prevalent in warm soils and attacks roots and
stems of a varied list of hosts, including bean,
lima bean, soybean, beet, corn, cowpea, cab-
bage, eggplant, garlic, gourds, pepper, straw-
berry and watermelon; also chrysanthemum,
dahlia, garden mallow, mountain-laurel, mari-
gold and zinnia. In most cases the pycnidial
stage is not formed. The mycelium spreads
through the soil, and very small black sclerotia
areformedingreatabundanceonorinlower
stems and roots. On beans, black sunken can-
kers appear just below the cotylendonary node,
and the lesion may extend up the stem, ashy
gray in the center. Stems may break over, or
the growing point may be killed. In sweet
potatoes the disease is a storage rot, the tissue
becoming a dark red-brown with the outer zone
black from the formation of myriads of sclero-
tia. The
Lenzites
Basidiomycetes, Aphyllophorales
Pores elongated radially to resemble gills; pileus
shelflike; woolly and zonate above.
Gloeophyllum sepiarium (formerly
Lenzites
saepiaria
).
Timber Rot
,
Brown Pocket Rot
,
usually of dead sapwood, occasionally a heart
rot, rarely on living trees. This is the common
destroyer of coniferous slash; it is found on
telephone poles and other timber. Fruiting bodies
are long narrow shelves coming from cracks,
the upper surface a yellow red to dark reddish
brown.
Lenzites betulina
Heart Rot
of birch and
cypress.
Lenzites
Gloeophyllum
sepiarum
).
Timber Rot
,
Brown Pocket Rot
, usu-
ally of dead sapwood, occasionally a heart rot,
rarely on living trees.
saepiaria
(see
▶
decay
is
spongy,
then
hard,
