432 
Journal of Agricultural Research voi. vm. No.«. 
Table II .—A morphological comparison of the species of Fusarium on soybean and 
cowpea 
FUSARIUM SP. ON SOYBEAN 
Medium. 
Macroconidia. 
Sporodochia. 
Sclerotia. 
Color of 
mycelium. 
Character of * 
mycelium. 
Standard nutrient 
No measure- 
Salmon-colored.. 
None. 
White. 
Mostly aerial 
and floccose, 
becoming ap¬ 
pressed in 
old age. 
Do. 
agar. 
String-bean agar. 
ments, 
.do. 
Salmon-colored; 
generally pres¬ 
ent. 
Flesh-colored_ 
Green. 
.do.... 
Oat hard glucose 
agar. 
Steamed rice. 
26.6 to 38.6 by 
3.69 to 4 92 11 
50 days old. 
Dark green.. 
Mostly lilac; 
some dark 
purple. 
Reds, pinks, 
lilacs, pur¬ 
ples. 
Green near 
sclerotia. 
White; some¬ 
times green 
near sclero¬ 
tia. 
Cottony. 
Potato plugs. 
Normal spores 
absent. 
22.5 to 43.6 by 
2.87 to 4. II fl 
14 days old. 
Salmon-colored; 
generally pres¬ 
ent on sclero¬ 
tia. 
Salmon-colored; 
small. 
Dark green.. 
Green; very 
small; nu¬ 
merous. 
Floccose. 
Floccose; 
scant. 
Stem plugs. 
F. TRACHEIPHILUM 
Standard nutrient 
agar. 
String-bean agar_ 
Oat hard glucose 
agar. 
Steamed rice. 
Potato plugs 
Stem plugs, 
None. 
Flesh-colored.. 
Mostly flesh- 
colored; 
some green. 
Da(k green 
and flesh- 
colored. 
White.. 
No measure - 
ments. 
22.5 to 36.9 by 
3.8 to 4.42 p so 
days, old. 
Salmon-col¬ 
ored; few. 
Flesh-colored.. 
.do. 
Mostly dark 
purple;some 
Pinks, reds, 
lilacs, pur¬ 
ples. 
Pmks, lilacs, 
greens. 
White; some¬ 
times green 
near sclero¬ 
tia. 
24.6 to 36.9 by 
3.28 to 4.42 M 
19 days old. 
Salmon-col¬ 
ored; often 
on sclerotia. 
Salmon-col¬ 
ored; small; 
sometimes 
none. 
Flesh-colored; 
often none. 
Green; very 
small; nu¬ 
merous. 
Mostly sub¬ 
merged or 
appressed. 
Do. 
Cottony to 
matted and 
appressed. 
Mostly ap¬ 
pressed. 
Appressed 
good growth 
No mention is made in Table II of pionnotes or odors, as none were 
produced in any of the cultures. The microconidia of both strains show 
a wide variation both in size and shape, but these differences can properly 
be included in the range of variation. The normal macroconidia of the 
soybean (fig. i, A-G) and cowpea strains are indistinguishable. The 
chlamydospores of either strain are terminal or intercalary in or on 
vegetative filaments and average 6 to 10.25 m in diameter. The conidio- 
phores are verticillately branched when normal. Sporodochia, although 
sometimes flesh-colored, are normally salmon-colored. They are not 
always present on all media, but are formed by each strain either on 
sclerotia or on mycelia as stromatal bases. Green sclerotia are normally 
present in both strains. There appear to be some differences in colors 
produced in substrata, although not very consistent ones, a difference in 
the character of mycelium until advanced ages of the cultures and gen- 
