Table 1 Performance of Spodoptera littoralis larvae on cotyledons from conventional and ULGCS cotton. First instars were fed with cotyledon leaf discs from conventional cotton (Coker 312) and two ULGCS cotton lines (RNAi 1: 66-49B and RNAi 2: 66–274) for seven days. Survival, weight, and consumed leaf area were measured after four and seven days. Means within one column followed by different letters are significantly different (Tukey HSD test) (n = 30–32)
From: Constitutive and induced insect resistance in RNAi-mediated ultra-low gossypol cottonseed cotton
Cotton type | Four days | Seven days | ||||
|---|---|---|---|---|---|---|
Weight (mg ± SE) | Leaf area consumed (cm2 ± SE) | Survival (%) | Weight (mg ± SE) | Leaf area consumed (cm2 ± SE) | Survival (%) | |
Coker 312 | 1.8 ± 0.23 b | 0.46 ± 0.083 | 59.4 | 28.9 ± 4.14 b | 2.70 ± 0.35 b | 59.4 |
RNAi 1 | 2.8 ± 0.32 a | 0.51 ± 0.064 | 82.9 | 43.1 ± 4.35 a | 4.74 ± 0.41 a | 77.1 |
RNAi 2 | 3.3 ± 0.27 a | 0.67 ± 0.079 | 72.7 | 49.8 ± 3.97 a | 5.03 ± 0.36 a | 69.4 |
GLM | F 2,71 = 5.9; p = 0.004 | F 2,69 = 1.9; p = 0.160 | χ2 2,100 = 4.6; p = 0.100 | F 2,68 = 5.9; p = 0.004 | F 2,68 = 11.3; p < 0.001 | χ2 2,100 = 2.5; p = 0.290 |