Table 2.

Effects of Bacillus thuringiensis var. israelensis (Bactivec®) on densities of immature stages of mosquitoes (Anopheles and culicines combined) and percent reduction in open-field trials during three subsequent treatments (T) with varying doses

Day	Average number per dip												Percentage reduction
	Early instars				Late instars				Pupae				Early instars			Late instars			Pupae
	C	T1	T2	T3	C	T1	T2	T3	C	T1	T2	T3	T1	T2	T3	T1	T2	T3	T1	T2	T3
0a	5.0	5.1	2.8	3.0	2.4	5.2	5.5	3.2	3.0	3.0	2.8	3.2	–	–	–	–	–	–	–	–	–
1	6.1	0.5	0	0.1	4.6	0.1	0.1	0.9	2.6	1.2	1.6	2.2	92.0	100	98.4	99.0	99.0	91.0	53.8	38.5	15.4
2	5.3	1.5	0.7	2.1	2.8	0.2	0	0.8	5.6	0.2	0	0	72.3	76.4	34.0	96.7	100	78.6	96.4	100	100
3	0.9	0.5	0.4	4.6	2.9	0	0.2	0.3	5.2	2.6	0.8	1.0	45.5	20.6	0	100	97.0	92.2	50.0	83.5	82.0
4	4.4	4.7	0.8	4.5	2.0	0	0	0.3	5.0	0.8	0	0	0	67.5	0	100	100	88.8	84.0	100	100
5	1.8	3.6	0.9	3.4	1.0	1.3	0.4	0.5	3.2	0	0	0	0	10.7	0	40.0	82.5	62.5	100	100	100
6	2.4	3.6	1.2	1.7	0.3	0.4	0.5	0.6	0	2.8	0	0	0	10.7	0	38.5	27.3	–	–	–	–
7	3.5	2.6	0.1	0.8	0.6	0	0.4	0.3	1.6	3.2	0.4	0.8	27.2	94.9	61.9	100	70.9	62.5	0	73.2	53.1
8	0.7	1.3	0.9	0.8	0.5	0.4	0.1	1.8	0.8	2.0	0.4	0.8	0	0	0	63.1	91.3	0	0	46.4	6.3
9	1.1	0.5	0.1	0.7	0.6	0.5	0.5	0.3	1.6	1.0	0.6	0.4	55.4	83.8	0	61.5	63.6	62.5	37.5	59.8	76.6
10	0.8	0.6	1.0	1.8	1.0	0.4	0.3	0.2	0.6	4.0	1.6	2.2	26.5	0	0	81.5	86.9	85.0	0	0	0

Abbreviations: T1, minimum label rate (2 ml/m²); T2, maximum label rate (5 ml/m²); T3, twice the maximum label rate (10 ml/m²); C, control.

^aDay of larvicide application.