Effect of a Juvenile Hormone Analogue on the Biology of the Stable fly (Stomoxys calcitrans (L.) Diptera : Muscidae)

Abstract

The biological studies of Stomoxys calcitrans (L.) were conducted under laboratory conditions those of 25±1 ^oC, 88±1% RH. And 31±3 ^oC, 76 ± 4% RH. The adults were fed on cow blood ahile the larvae were reared on cow blood and cow dung. The mean duration of the life cycle under the two conditions were slightly different, 27 days and 28 days respectively. Larval development was not significantly different under the two laboratory conditions. Upon feeding on cow dung mixed with various concentrations of JHa (2-methoxy-9-(4-isopropyl) isopropyl) -2,-6dimethylnonane, (MV-678), al the larvae were found dead at a concentration of 100 ppm while a certain number of larvae were able to enter pupal stage at 10, 1 and 0.1 ppm but no adult emergence. However, after dissecting these puparia, the pupal adult intermediate forms were found. The o-hour-old puparia treated with MV-678 at different concentrations revealed the same result. The LC50 of the compound for the adult male and female when subjected to topical application were 0.589 and 0.708 microgram respectively.