Did the prolonged residual efficacy of clothianidin products lead to a greater reduction in vector populations and subsequent malaria transmission compared to the shorter residual efficacy of pirimiphos-methyl?

Table 7 Parous rate of An. gambiae s.l. in IRS and control communes after the 2019, 2020 and 2021 IRS campaign

Period (Insecticides)	department	Communes	Nb of An. gambiae s.l. dissected	Nb of parous	Parous rate (%)	p-value
2019, after IRS (P M 300CS)	Alibori	Bembèrèkè (control)	551	362	65.7	< 0.0001
	Alibori	Kandi + Gogounou	427	175	41.0	< 0.0001
	Donga	Bassila (control)	314	207	65.9	< 0.0001
	Donga	Djougou + Copargo	470	196	41.7	< 0.0001
2020, after IRS (clo + del)	Alibori	Bembèrèkè (control)	179	112	62.6	0.0004
	Alibori	Kandi + Gogounou	237	106	44.7	0.0004
	Donga	Bassila (control)	247	144	58.3	< 0.0001
	Donga	Djougou + Copargo	343	276	80.5	< 0.0001
2021, after IRS (clo 50WG)	Alibori	Bembèrèkè (control)	117	94	80.3	0.49
	Alibori	Kandi + Gogounou	317	243	76.7	0.49
	Donga	Bassila (control)	77	69	89.6	0.17
	Donga	Djougou + Copargo	212	174	82.1	0.17

p-value: comparison of the parous rate of An. gambiae s.l. between the treated and control communes (Test used: Chi-square test); Nb: Number; PM: pirimiphos-methyl; CS: capsule suspensions; WG: Water dispersible granules; Clot + Del: mixture clothianidin 500 g/kg + deltamethrin 62.5 g/kg; Clo 50WG: clothianidin 50 WG

ISSN: 1475-2875