Long-lasting control of Anopheles arabiensis by a single spray application of micro-encapsulated pirimiphos-methyl (Actellic® 300 CS)

Table 8 Supplementary experimental hut results for percentage mortality and blood-feeding, 13-16 months after spraying

Time after spraying	Outcome measures	Untreated (Mud)	CS-B (Concrete)	CS-BM (Concrete)	CS-B (Mud)	CS-BM (Mud)	EC (Mud)
13 Months (EC Walls & Ceiling Covered)	Total Caught	92	181	204	143	170	115
	% Mortality	1	65	67	78	74	29
	95% CI	(1 to 6)	(51 to 77)	(45-83)	(63-88)	(61-83)	(13-51)
	% Blood-fed	94	32	30	19	38	63
	% BFI	-	66	68	80	60	33
15-16 Months (Ceiling Uncovered)	Total Caught	411	592	870	576	685	629
	% Mortality	5	34	42	48	63	43
	95% CI	(2-12)	(27-42)	(33-51)	(36-59)	(46-77)	(31-55)
	% Blood-fed	59	48	53	51	42	52
	% BFI	-	19	10	14	29	12
15-16 Months (Ceiling Covered)	Total Caught	303	557	455	390	498	580
	% Mortality	7	48	49	49	53	46
	95% CI	(3-15)	(41-55)	(38-60)	(38-59)	(41-64)	(37-55)
	% Blood-fed	69	47	46	51	45	54
	% BFI	-	32	33	26	35	22

During month 13 the walls and ceiling of the hut sprayed with p-methyl EC were covered with plastic sheeting. Between months 15 and 16 the treated walls of every hut were covered with plastic sheeting for one out of every two weeks. Data are grouped according to whether the walls were covered or uncovered. BFI = blood-feeding inhibition compared to untreated control.

ISSN: 1475-2875