Table 2. Parameter estimates from the Hollings Disc equation for a Type II functional response.
No significant difference in Th and T/Th were estimated for third instar nymphs of O. strigicollis. However, it was shortest and maximum when adult female fed on T. vaporariorum respectively. No significant difference recorded in coefficient of attack rate (α) for both prey species.
| Parameters | 3rd instar | Adult | ||
|---|---|---|---|---|
| B. tabaci | T. vaporariorum | B. tabaci | T. vaporariorum | |
| Handling Time (Th) | 2.453 | 2.443 | 2.158 | 1.752 |
| Attack rate (α) | 0.063 | 0.052 | 0.059 | 0.054 |
| Max. predation rate (T/Th) | 9.78 | 9.82 | 11.12 | 13.70 |