Small-scale evaluation of the efficacy and residual activity of alpha-cypermethrin WG (250 g AI/kg) for indoor spraying in comparison with alpha-cypermethrin WP (50 g AI/kg) in India

Table 1 Results of chemical analysis of filter samples collected from sprayed houses

Formulation	Surface type	Target dose (mg/m²)	Applied dose (mg ai/m²)	No. filter-paper samples analysed	Applied/target ratio	D	RSD
WP	Cement wall + distemper coated	20	30.5	6	1.53	5.87	19.3
	Cement wall + lime coated	20	17.3	6	0.87	5.66	35.6
	Mud wall + lime coated	20	29.8	6	1.5	4.8	16.1
	Brick wall unpainted	20	33.06	6	1.66	7.4	22.4
	Cement wall + distemper coated	30	20.55	6	0.68	7.5	36.7
	Cement wall + lime coated	30	26.55	6	0.88	11.6	43.8
	Mud wall + lime coated	30	22.8	6	0.76	12.2	53.6
	Brick wall unpainted	30	31.7	6	1.06	13.5	42.5
WG	Cement wall + distemper coated	20	17.7	6	0.89	8.4	47.5
	Cement wall + lime coated	20	23.3	6	1.17	5.76	24.7
	Mud wall + lime coated	20	22.8	6	0.9	15.3	85.3
	Brick wall unpainted	20	21.7	7	1.11	3.7	16.9
	Cement wall + distemper coated	30	26.45	6	0.83	11.1	44
	Cement wall + lime coated	30	30.8	6	1.03	11.9	38.7
	Mud wall + lime coated	30	53.85	6	1.8	10.9	20.3
	Brick wall unpainted	30	26.4	6	0.88	15.1	57.4

ISSN: 1475-2875