Table 3.

Comparison of density of immature mosquito stages between control and treated tubs in open-field trials: P-values calculated by non-parametric Kruskal-Wallis multiple-comparison Z-value test

Larvicide	Daya	Effect of treatment compared to control
		Early instars			Late instars			Pupae
		T1	T2	T3	T1	T2	T3	T1	T2	T3
Bti	1	ns	0.0013	0.0041	0.0041	0.0041	0.0181	ns	ns	ns
	2	0.0192	ns	0.0457	0.0113	0.0010	0.0175	ns	0.0225	0.0225
	3	ns	0.0221	ns	0.0013	0.0066	0.0173	ns	ns	ns
	4	ns	0.0382	ns	0.0013	0.0013	0.0173	ns	0.0225	0.0225
	5	ns	ns	ns	ns	0.0410	0.0330	0.0225	0.0225	0.0225
	6	ns	ns	ns	0.0410	ns	ns	ns	0.0225	0.0225
	7	ns	ns	ns	0.0010	0.0260	0.0260	ns	ns	ns
	8	ns	ns	ns	0.0100	0.0040	ns	ns	ns	ns
	9	ns	0.004	ns	ns	0.0120	0.0280	ns	ns	ns
	10	ns	ns	ns	0.0220	0.0281	0.0070	ns	ns	ns
Bs	1	0.0032	0.0032	0.0032	0.0032	0.0032	0.0106	ns	ns	0.0144
	2	0.0342	0.0318	0.0032	0.0032	0.0032	0.0032	0.0363	0.0363	0.0363
	3	ns	ns	ns	0.0318	ns	0.0106	ns	0.0363	0.0363
	4	ns	ns	ns	0.0382	0.0032	0.0032	0.0363	0.0363	ns
	5	ns	ns	ns	ns	ns	ns	0.0363	0.0363	0.0363
	6	ns	ns	0.0267	0.0224	ns	ns	0.0363	0.0363	0.0363
	7	ns	ns	ns	0.0295	ns	ns	ns	0.0363	0.0363
	8	ns	ns	ns	0.0106	0.0032	0.0451	ns	0.0363	ns
	9	ns	ns	ns	ns	0.0106	ns	ns	ns	ns
	10	ns	ns	ns	ns	ns	ns	0.0091	ns	ns

Abbreviations: T1, minimum label rate; T2, maximum label rate; T3, twice the maximum label rate for the respective Bti and Bs trials; ns, not significant (P > 0.05).

^aDays post-treatment.