Insecticidal Effect and Residual Action of Fenitrothion and Esfenvalerate on Sitophilus oryzae and S. zeamais (Coleoptera: Curculionidae) in Stored Maize and Wheat

Table 3

Estimates of the α and β parameters of the linear binomial model and probability descriptive level for the effect of linear regression of time after treatment as to species, insecticide, and type of grain.

Insecticide	S. oryzae			S. zeamais
	α	β	Linear regression (Pr > 𝜒^2)	α	β	Linear regression (Pr > 𝜒^2)
	Maize			Maize
Control	4.1928	0.0406	0.0072	4.9472	0.0075	0.5805
Esfenvalerate	3.4543	0.2609	<0.0001	4.7926	−0.0402	0.4677
Fenitrothion	1.2569	0.3107	<0.0001	−6.8929	0.9024	<0.0001
Fenit. + Esfen.	1.8438	0.2516	<0.0001	−9.0775	1.0361	<0.0001
	Wheat			Wheat
Control	5.1084	0.0418	0.0012	4.9719	0.0165	0.1787
Esfenvalerate	5.2773	−0.0920	0.0534	5.2261	−0.2507	<0.0001
Fenitrothion	−0.4039	0.6145	<0.0001	−21.0609	1.9574	<0.0001
Fenit. + Esfen.	−0.4534	0.5886	<0.0001	−14.2542	1.2609	0.0051