Research Article

Larvicidal Activities and Synergistic Effects of Essential Oils against Anopheles funestus and Culex quinquefasciatus (Diptera: Culicidae) from Kisumu, Kenya

Table 4

The 50% and 90% lethal concentrations (LC50 and LC90, respectively), their 95% confidence intervals, and regression parameters of the larvicidal activity of essential oils against Culex quinquefasciatus 24 h post treatment.

PlantsLC50 (ppm)LLC-ULCLC90 (ppm)LLC-ULCChi2(Wald)-value

LM27.24(10.45–33.44)35.76(26.16–39.15)18.72
LCh54.11(43.36–63.74)102.45(92.01–115.24)111.34
LCa38.54(34.15–42.45)62.14(56.51–71.08)51.65
CS23.32(20.80–25.72)34.25(31.34–38.40)65.02

LC: lethal concentration; LCL: lower confidence limit; UCL: upper confidence limit; ppm: parts per million; LM: Lippia multiflora; LCh: Lippia chevalieri; LCa: Lantana camara; CS: Cymbopogon schoenanthus.