Table 4.

Percentage of positivity of catch basins for Aedes and Culex larvae and pupae observed in 10% of the catch basins treated with pyriproxyfen during the seven months intervention period.

Month	Catch basins sampled n	Percentage of positivity in catch basins
		Aedes larvae	Culex larvae	Pupae◆
February 28	360	60.5	39.7	26.9
March 30	422	46.9**	22.2**	9.0**
April 30	387	42.9**	47*	17.2**
May 30	384	46**	47*	11**
June 30	383	42.3**	39.4	13.1**
July 30	348	43.1**	41.1	15.1**
August 30	389	40.1**	35.4	13.3**

^◆Pupae positivity for both species compared to baseline (February).

^*p-value <0.05.

^**p-value <0.001.