Table 1.

Percentage mortality rates of Ae. aegypti larvae exposed to different concentrations of temephos.

Concentration/ppm	Percentage mortality (%)
	Attanagalla	Negombo
0.125	36.0 + 1.9 (34.1–37.9)	14.0 + 1.8 (12.2–15.8)
0.250	51.0 + 4.5 (46.5–55.5)	21.0 + 2.4 (18.6–23.4)
0.375	64.0 + 1.9 (62.1–65.9)	36.0 + 1.9 (34.1–37.9)
0.050	89.0 + 1.9 (87.1–90.9)	70.0 + 4.2 (65.8–74.2)
0.100	99.0 + 1.7 (97.3–100.0)	95.0 + 2.7 (92.3–97.7)