492 
corms were cultured, and Fusarium was 
recovered from each of them. One corm 
remained healthy. 
SporLiGHT: 10 plants emerged; 6 sur- 
vived and produced new corms. Three of 
the new corms were completely mummified 
at cleaning time. One corm was three- 
fourths rotted; another contained a dis- 
colored vascular strand but had no exter- 
nal symptoms. Fusarium was recovered 
from the rotted corm but not from the dis- 
colored vascular strand. One corm re- 
mained healthy. 
ELIZABETH THE QUEEN: 10 plants 
emerged; all survived and produced new 
corms. Two of the new corms were mum- 
mified at cleaning time, the other 8 had no 
disease symptoms. No attempt was made 
to recover the Fusarium. 
Vascular isolate 45-73 
Dr. F. E. BENNETT: 7 plants emerged ; 
5 survived and produced new corms. Two 
ILLINnois NATURAL History SURVEY BULLETIN 
Vol. 26, Art. 6 
of the new corms had brown vascular 
strands; 3 had no symptoms. Fusarium 
was recovered from both of the affected 
corms. 
MARGARET FuttTon: 10 plants 
emerged; all survived and produced new 
corms. One corm had brown vascular 
strands; 9 had no symptoms. Fusarium 
was recovered from the affected corm. 
SPOTLIGHT: 10 plants emerged; all sur- 
vived and produced new corms. ‘Three of 
the new corms had brown vascular 
strands; 7 remained healthy. Fusarium 
was recovered from 2 of the affected corms. 
ELIZABETH THE QUEEN: 10 plants 
emerged; all survived and produced new 
corms. Eight of the new corms had exten- 
sive discolored vascular strands; 2 of 
them had thick brown rot lesions also. No 
connections between the brown rot lesions 
and the vascular streaks were found in 
any of the corms. Fusarium was recovered 
from all 8 of the affected corms. Two of 
Table 22.—Results of greenhouse tests on gladiolus variety Variation inoculated with 
Fusarium, February, 1952; new corms were examined in August of the same year. 
Numser oF New Corms OBTAINED 
PLANTS Fusarium 
ISOLATE DEVEL- B Vascular Basal RE- 
OPP Total (ealthysbaneas Dis- Dry | COVERED* 
ot : 
coloration Rot 
Brown rot 45-8........ 10 i) az. 0 5 0 0/4 
Brown rot 45-74....... 10 8 6 0) D 0 0/0 
Brown rot 47-1........ 10 3 2 0) 1 1 1/1 
Brown rot 47-12........ 10 6 0) 0 6 5 2/4 
Brown rot 47-32....... 10 6 0 0 6 6 3/5 
Brown rot 49-8........ 10 10 3 0 i, 0 4/7 
Browisrot 50-/). 2 cee. 9 Wl 0 0 0 0 0/0 
Brown rot 50-22. 10 3 1 1 1 0 0/0 
WEL See or ea) ee. 79 50 14 1 28 12 10/21 
Wasculat-45-73.../355 ou: 10 9 1 0 8 0 5/6 
Vascular 46-3. .:2.... 2%). 10 10 wf 0) 3 0 0/3 
Vascular 46-9.......... 10 10 6 0 4 0 3/3 
Vascular 47-10......... 10 10 10 0 0) 0 0/0 
Vascular 49-4.......... 10 8 0 0 1 7. 0/0 
Vascular 49-235. 4.2... 10 10 10 0 0 0 0/0 
Vascular 50-6.......... ha S10 10 7 0 3 0 0/2 
Vascular 50-24...) 26. poster 10 8 0 1 1 0/1 
Vascular 50-28.........} 10 9 0 0) 9 0 1/3 
I beh 7) he geg a ee eee ee ae OO) 86 49 0 29 8 9/18 
Basal dry rot 49-20.....! 10 10 10 0 0 0 0/0 
Basal dry rot 50-23..... 10 9 7 0 2 0 0/2 
Basal dry rot 50-26..... 9 oy 3 0 0 4 0/2 
OLAL Tre ce pee 29 26 20 0 2 4 0/4 
Check Nome eee ow 10 9 9 0 0 0 0/0 
heck No: dew sex rc: 10 10 6 0 0 4 0/4 
ChecktNou3a. feet sy 10 10 9 0 1 0 0/1 
BLOtGL An we. tease Ae 30 29 24 0 1 4 0/5 
*The numerator indicates the number of successful isolations, the denominator the number of corms from which 
isolations were attempted. 
