A tool box for operational mosquito larval control: preliminary results and early lessons from the Urban Malaria Control Programme in Dar es Salaam, Tanzania

Table 3 Formulation-dosage combinations recommended to UMCP staff to achieve 100% control of mosquito larvae within 24 hours.

Product^a	Active	Dosage		Application
	Ingredient^b	kg/hectare	g/m²	Cycle
Open habitats ^c
VectoLex^® WDG (650 ITU/mg)	Bs	2.0	0.20	1 week
VectoBac^® WDG (3000 ITU/mg)	Bti	0.4	0.04	1 week
VectoLex^® CG (50 ITU/mg)	Bs	30	3	1 week
VectoBac^® CG (200 ITU/mg)	Bti	10	1	1 week
Closed habitats ^c
VectoLex^® CG (50 ITU/mg)	Bs	10	1	3 months

^a ITU = International Toxic Units, describes the potency of larvicide, the higher the number, the more toxic is 1 mg the less is needed to kill 100% of larvae within 24 hrs
^b Bti; Bacillus thuringiensis var israelensis, Bs; Bacillus sphaericus
^c See box 1 for definitions.