Table 1. Baseline Helicoverpa preferences and seasonal availability for different habitat types.
| preference | preference | gen 1 | gen 2 | gen 3 | gen 4 | gen 5 | gen 6 | |
|---|---|---|---|---|---|---|---|---|
| Habitat | H. armigera | H. punctigera | 15 Oct | 1 Dec | 15 Jan | 1Mar | 15 May | 15 Aug |
| Bt cotton | 0.40 | 0.40 | 0 | 1 | 1 | 1 | 0 | 0 |
| Conventional cotton | 0.40 | 0.40 | 0 | 1 | 1 | 1 | 0 | 0 |
| Pigeon pea | 0.90 | 0.90 | 0 | 1 | 1 | 1 | 0 | 0 |
| Chick pea | 0.98 | 0.98 | 1 | 1 | 0 | 0 | 0 | 0 |
| Maize | 0.70 | 0 | 0 | 2/3 | 2/3 | 2/3 | 2/3 | 0 |
| Sorghum | 0.57 | 0 | 0 | 2/3 | 2/3 | 2/3 | 2/3 | 0 |
| Cereal | 0.10 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| H. armigera native | 0.01 | – | 1 | 1 | 1 | 1 | 1 | 1 |
| H. punctigera native | – | 0.05 | 1 | 1 | 1 | 1 | 1 | 1 |
Values for preferences are based on oviposition lab bioassays of Jallow and Zalucki [44]. Values for seasonal availability are the proportion of the total annual area of habitat available to each of the six possible generations of Helicoverpa.