“…In general, some commercial and experimental compounds of these groups manifest insecticidal activity in the range of 1-50 ppb against mosquito larvae. Petroleum hydrocarbons and cationic surfactant aliphatic amines are also routinely used for mosquito control; however, the susceptibility of mosquito larvae to these two insecticides is not as great as that to the synthetic insecticides described above (Hagstrum and Mulla, 1968; Micks et al, 1967Micks et al, , 1968; Mulla and Darwazeh, 1971). The effective rates of the petroleum hydrocarbons against mosquito larvae are generally in the order of 20-50 ppm.…”