Table 1.
Summarized model of analysis of deviance for effects of the variety of cotton1, strain of insect2, and exposure time interval3 of neonate to plants on survival of Spodoptera frugiperda and analysis of variance (ANOVA) on host acceptance, percentage of neonates that were found on plants and that fed on plant tissues (IFP) and percentage of post-feeding dispersal (PFD).
Effect | Df | Survival | Host acceptance | IFP | PFD | ||||
---|---|---|---|---|---|---|---|---|---|
F | P | F | P | F | P | F | P | ||
Block | 3 | 0.74 | 0.5357 | 0.34 | 0.7954 | 12.47 | <0.0001 | 7.72 | 0.0003 |
Variety | 1 | 11.90 | 0.0410 | 2.29 | 0.1369 | 1.40 | 0.2433 | 6.64 | 0.0155 |
Strain | 1 | 0.26 | 0.6119 | 15.15 | 0.0003 | 9.10 | 0.0042 | 0.49 | 0.4888 |
Time | 3 | 1.11 | 0.2981 | 0.74 | 0.5343 | 3.96 | 0.0137 | 0.55 | 0.6527 |
Variety x Strain | 1 | 1.52 | 0.2009 | 1.41 | 0.2412 | 7.25 | 0.0111 | 1.04 | 0.3150 |
Variety x Time | 3 | 0.44 | 0.7254 | 1.57 | 0.2100 | 0.41 | 0.7467 | 0.89 | 0.4533 |
Strain x Time | 3 | 3.81 | 0.0199 | 6.04 | 0.0024 | 5.08 | 0.0053 | 3.11 | 0.0422 |
Variety x Strain x Time | 3 | 0.38 | 0.7670 | 0.42 | 0.7374 | 0.33 | 0.8062 | 0.09 | 0.9642 |
1Varieties: Bt (WideStrike) and non-Bt near isoline cotton.
2Strains: Susceptible and resistant to Cry1F.
3Time intervals: 0–6 h, 6–12 h, 12–18 h, and 18–24 h.