Efficacy of baysir-8514 and precoccene ll against the grey flesh fly parasarcophaga dux [thomson] [diptera: sarcophagidae]

ABSTRACT

Five doses [1, 0.5, 0.25, 0.125 and 0.0625] of the chitin inhibitor Baysir-8514 and anti-juvenoid precocene II were topically applied to the third larval instar of the grey flesh fly Parasarcophaga dux. Toxicity of both compounds was recorded against different developmental stages at different dose levels. The lowest dose [0.0625] of both compounds caused a low toxicity% [0.1]. On the other hand, the highest dose [1 mg] increased the larval, pupal and adult malformations after larval treatment by both compounds. Highest percentage of larval deformations was obtained by the maximal dose- level [1 mg], which in turn did not lead to the highest percentage of adult deformations. Shortening of larval-pupal durations and adult longevities were observed. Sterilizing action of precocene II on P. dux could be remarkably detected by the effect of higher doses [0.5 and 1%] on the 3rd larval instar, because no larvae were deposited by the emerging adult females. Doses of 0.125 and 0.0625 mg inhibited the female natality developmental stages