Functional Responses of Nephus arcuatus Kapur (Coleoptera: Coccinellidae), the Most Important Predator of Spherical Mealybug Nipaecoccus viridis (Newstead)

Table 2

Parameters estimated by Rogers’s random predator equation as well as and maximum predation rate () for six life stages of N. arcuatus fed on N. viridis.

Stages of predator	Parameter	Estimate	Approximate SE	⁢Approximate 95% confidence
				Lower	Upper
1st instar		0.2749	0.1132	0.0493	0.5004	4.4	0.999
		5.4252	0.2844	4.8583	5.9921
2nd instar		0.5142	0.1662	0.1841	0.8443	20	0.982
		1.1995	0.0375	1.1249	1.2740
3rd instar		0.0142	0.00344	0.00739	0.0210	59.2	0.989
		0.4064	0.00604	0.3945	0.4184
4th instar		0.00660	0.00244	0.00177	0.0114	160.9	0.986
		0.1492	0.00403	0.1412	0.1572
Adult females		0.00859	0.00265	0.00333	0.0138	84.2	0.978
		0.2850	0.00978	0.2656	0.3044
Adult males		0.4726	0.2252	0.0254	0.9199	30.9	0.976
		0.7765	0.0318	0.7133	0.8398