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

Table 1

Results of logistic regression analysis of the proportion of N. viridis consumed by different stages of N. arcuatus as a function of initial prey density.

Stages of predator	Coefficient	Estimate	SE		value
1st instar	Constant	3.4233	1.0793	10.06	0.0015
	Linear	−0.5926	0.3537	2.81	0.0939
	Quadratic	0.0273	0.0351	0.61	0.4359
	Cubic	−0.00048	0.00106	0.21	0.6474
2nd instar	Constant	9.6343	1.9010	25.69	<0.0001
	Linear	−0.6126	0.1849	10.98	0.0009
	Quadratic	0.0131	0.00565	5.39	0.0202
	Cubic	−0.00010	0.000055	3.23	0.0724
3rd instar	Constant	3.1992	0.3966	65.07	<0.0001
	Linear	0.0411	0.0193	4.56	0.0326
	Quadratic	−0.00143	0.000286	24.96	<0.0001
	Cubic			31.55	<0.0001
4th instar	Constant	4.0195	0.6154	42.67	<0.0001
	Linear	0.0686	0.0162	18.04	<0.0001
	Quadratic	−0.00080	0.000129	38.68	<0.0001
	Cubic			40.09	<0.0001
Adult females	Constant	3.1257	0.6513	23.03	<0.0001
	Linear	0.1424	0.0358	15.78	<0.0001
	Quadratic	−0.00311	0.000575	29.35	<0.0001
	Cubic	0.000015		30.64	<0.0001
Adult males	Constant	13.4559	1.9436	47.93	<0.0001
	Linear	−0.6228	0.1122	30.79	<0.0001
	Quadratic	0.00970	0.00206	22.07	<0.0001
	Cubic	−0.00005	0.000012	17.88	<0.0001