Table 1. Evaluation of GEM inbreds from Iowa for fall armyworm and corn earworm resistance in Tifton, GA 2012
Plot TiftEntry Dr. B- Entry
3306
1
6
3316
2
7
3312
3
8
3314
4
9
3309
5
10
3307
6
11
3301
7
12
3305
8
13
3302
9
14
3317
10
15
3319
11
16
3311
12
17
3315
13
24
3313
14
25
3318
15
26
3310
16
SC102
3304
17
Ga209
3308
18
Ab24E
3303
19
Mp708
Pedigree
GEMS-0201
GEMS-0202
GEMN-0204
GEMN-0205
GEMS-0206
GEMN-0152
GEMS-0115
GEMN-0196
GEMN-0204
GEMN-0205
ANTIG03:N1242-B-007-B
GEMS-0219
LH195
GEMN-0217
GEMS-0215
Tifton control-CEW-Resistant
Tifton control-CEW-Susceptible
Tifton control-FAW-Susceptible
Tifton control-FAW-Resistant
Gem #
10GEM06841
10GEM06842
10GEM06844
10GEM06845
10GEM06846
05GEM08645
06GEM02107
09GEM07770
10GEM06844
10GEM06845
11GEM06033
11GEM06359
11GEM06446
11GEM06531
11GEM06561
Info
Retest
Retest
Retest
Retest
Retest
New
New
New
New
New
New
New
New
New
New
Type
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
Inbred
FAW Resistancea
FAW7d FAW14d FAWmean
2.50
2.50
2.50
2.13
2.25
2.00
2.50
3.00
2.75
1.50
1.75
1.63
2.50
4.00
3.25
1.25
1.75
1.50
2.75
2.75
2.75
1.50
2.50
2.00
1.50
3.00
2.25
1.25
2.25
1.75
1.75
2.50
2.13
1.75
2.00
1.88
1.50
2.25
1.88
2.75
3.00
2.88
2.50
2.75
2.63
2.25
4.38
3.31
3.50
3.75
3.63
2.50
3.25
2.88
1.25
1.25
1.25
Husk tightness
2.23
2.93
3.15
3.23
2.95
3.25
3.00
3.75
2.80
2.95
3.25
3.03
3.18
3.10
3.43
2.68
3.15
2.45
2.87
CEW Resistanceb
Extension (cm) CEW damage (cm)
11.25
2.69
8.95
3.10
6.25
2.33
6.43
1.00
6.40
4.21
4.13
3.08
8.45
2.98
6.48
2.10
6.48
3.00
6.45
1.13
3.10
2.10
4.73
3.23
3.48
0.83
7.38
2.70
5.68
2.13
3.30
2.85
8.07
2.25
6.03
4.25
8.22
4.00
a FAW damage was rated based on a visual rating scale of 1-9; 1=no damage, and 9= complete defoliation; The fall armyworm damage was rated on 7 and 14 d after the artificial infestation
with at least 20 neonate larvae
b The corn earworm damage was assessed using artificial infestation as well. The corn ears with fresh silk at flowering time were infested with 2-5 corn earworm eggs. The eggs were
suspended in 0.2% agar solution, and applied on the fresh silk using a soap dispenser. The corn earworm damage was assessed at pre-harvest.
CEW resistance was rated besed on CEW damage, husk tightness and husk extension; CEW damage was rated by worm penetration into the cob (cm);
Husk tightness was rated 3 weeks after flowering with a scale of 1-5; 1=very loose husk and 5= very tight husk; Husk extension is measured at pre-harvest with the length (cm) of husk above the
tip of the cob.