September, 1955 FORSBERG: 
That germinating spores of the gladi- 
olus Fusarium anastomose was observed in 
the studies reported here, fig. 22, but cyto- 
logical studies were not made and no spe- 
cific attempt was made to relate this phe- 
nomenon to subsequent variation of the 
If, however, the interpretation 
isolates. 
FUSARIUM DISEASE OF GLADIOLUS 
497 
of Hansen & Smith (1932) is correct, 
this phenomenon could account for the 
variants both in form of growth and in 
pathogenicity of the gladiolus Fusarium. 
Miller (19452, 19455, 1946a, 1946d), 
in studies of the muskmelon-wilt Fusar- 
ium and other species, reported that when 
Table 25.—Disease forms produced by 27 isolates of Fusarium in experiments performed 
in 1, 2, or 3 years. 
Disease Form From | YEAR 
IsOLATE Wuicu OricInat Iso- 
LATE Was OBTAINED 1948 1952 1953 
7 re | Vascular Vascular Vascular Vascular, brown 
| rot 
fob eet <a Meee Vascular Basal dry rot Vascular Vascular, basal dry 
rot 
1S eee Vascular None Vascular 7 
ace eo ares Vascular None — = 
ASE Sa ae ene Vascular Basal dry rot — — 
47-10........| Vascular _— Vascular Vascular 
PEEP RG Se) oo, Vascular — Complete rot, Basal dry rot, 
vascular, basal vascular 
dry rot 
FES ears, 3 Vascular — Vascular = 
SU-Geeee cae. Vascular _ Complete rot, — 
vascular, brown 
rot 
50-24 Vascular — Basal dry rot, None 
vascular, brown 
rot 
ESO Wrest aie: Brown rot Basal dry rot Vascular - 
Ake seems Brown rot None Vascular, — 
brown rot 
OSES aeeeietier Brown rot Complete rot — = 
AGA eae. Brown rot Basal dry rot — = 
AG-\2 4... .22|. basal dry rot Basal dry rot — == 
VERY ce tenedeete Brown rot Complete rot Complete rot, = 
vascular, basal 
dry rot 
47-12 Brown rot Complete rot Complete rot, Complete rot, 
vascular, basal brown rot, 
dry rot vascular 
47-32 Brown rot Basal dry rot Vascular, basal Rrown rot, vascu- 
dry rot lar, basal dry rot 
Sash ae alas ns Brown rot = Complete rot Basal dry rot, 
brown rot 
Ba. Sravaee we Brown rot = Complete rot, Brown rot, 
brown rot, vascular 
vascular 
Ee ee TR Basal dry rot _— — Basal dry rot, 
vascular 
47-3.........| Basal dry rot = — Basal dry rot, 
vascular 
49-8.........| Brown rot — Vascular —- 
41) eee Basal dry rot — Vascular — 
50-23 Basal dry rot — Vascular, basal Basal dry rot, 
; dry rot, brown vascular 
rot 
50-26 Basal dry rot = Basal dry rot, Basal dry rot, 
vascular brown rot, 
vascular 
50-28 Vascular = Vascular ~- 
