MORPHOLOGICAL ABERRATIONS INDUCED BY METHOPRENE, A JUVENILE-HORMONE ANALOG, IN ANOPHELES DIRUS SS AND AN-SAWADWONGPORNI (DIPTERA, CULICIDAE)

Effect of Methoprene (isopropyl 11-methoxy-3,7, 11-trimethyldodeca-2, 4-dienoate), a juvenile hormone analogue, on Anopheles dirus s.s and A n. sawadwongporni were investigated under laboratory conditions (28 de grees+/-1.7 degrees C, 86+/-3% RH, and 42-h light-dark photophase). Me thoprene induced a wide range of morphogenetic aberrations in the 24-h egg treatment in both An. dirus s.s. and An. sawadwongporni The major ity of mosquito populations died as pupae exhibited various degrees of morphogenetic aberrations, Several other morphogenetic aberrations we re noted and were grouped into eight categories according to the stage of death. No significant difference of hatchability of both species w as detected when different concentrations of Methoprene between 0.0001 mg/l and 1 mg/l were studied (P<0.5).