Efficacy of extended release formulations of Natular™ (spinosad) against larvae and adults of Anopheles mosquitoes in western Kenya

Table 1 Summary statistics for evaluation of Spinosad application on habitat occupancy and immature density as measured every 2 weeks in a 500 × 500 m grid within each village

Parameter	Measure	Control	Intervention
Number of habitats	Total habitats	1,037	1,279
Area	Mean area	7.4 (6.7–8.0)	10.5 (8.9–12.2)
Area	Median area	5.0 (3–8)	6.0 (4–12)
Habitat occupancy	Percent with immatures	38.3 (37.1–39.4)	3.8 (3.5–4.2)
All instars	Mean per dip	1.0 (0.83–1.17)	0.10 (0.06–0.15)
	Mean per habitat	5.46 (4.65–6.26)	0.59 (0.4–0.78)
	Mean per m²	1.64 (0.94–2.34)	0.14 (0.02–0.25)
Early instars	Mean per dip	0.83 (0.74–0.93)	0.04 (0.03–0.05)
	Mean per habitat	3.98 (3.48–4.47)	0.18 (0.13–0.22)
	Mean per m²	1.41 (0.94–1.86)	0.04 (0.03–0.05)
Late instars	Mean per dip	1.83 (1.61–2.06)	0.14 (0.09–0.19)
	Mean per habitat	9.43 (8.33–10.5)	0.76 (0.56–0.97)
	Mean per m²	3.04 (1.99–4.09)	0.18 (0.06–0.3)

ISSN: 1475-2875