Functional response of the predatory species Orius albidipennis Reuter (Hemiptera: Anthocoridae) to two life stages of Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae)

Egyptian Journal of Biological Pest Control

Table 1 Maximum-likelihood estimates from logistic regressions of the proportion of Bemisia tabaci eggs and third instar nymphs eaten by Orius albidipennis on initial prey density

Developmental stage	Type	Coefficient	Estimate	SE	Chi-Squared value	P value
Third nymphal instar	III	Constant	− 0.1938	0.6407	0.09	0.07623
		Linear	0.1083	0.1150	0.89	0.03464
		Quadratic	− 0.00184	0.00592	0.10	0.07559
		Cubic	− 0.00003	0.92 × 10⁻⁴	0.08	0.07711
Egg	II	Constant	0.5908	0.6447	0.84	0.03595
		Linear	− 0.0719	0.1157	0.39	0.05344
		Quadratic	0.00837	0.00597	1.96	0.01613
		Cubic	− 0.000119	0.93 × 10⁻⁴	4.05	0.0443