九种植物精油对腌肉及咸鱼害虫大头金蝇的杀卵作用

Ovicidal activity of nine essential oils against Chrysomya megacephara in bacon and kipper

为开发腌肉和咸鱼害蝇的安全性杀卵剂,采用改进的浸卵法,进行了9种植物精油对大头金蝇的杀卵活性测定.结果表明:肉桂、丁香、八角茴香3种植物精油较为有效,它们的杀卵毒力(LC50)依次为0.428、1.605和2.489mg.ml-1,以肉桂油的毒力最强.通过GC/MC成分分析,从肉桂油检出22个成分,主成分桂皮醛占92.33%.合成桂皮醛(含量97.33%)的毒力为0.281mg.ml-1,略高于肉桂油,表明桂皮醛是肉桂油的主要杀卵活性成分,可替代肉桂油作为害蝇杀卵剂利用.

To csoloit safe ovicides against the flies that attack bacon and kipper, the ovicidal activity of 9 plant essential oils was investigated by a modified egg-clipping method. The results indicated that the essential oils from Cinnamomun cassia, Eugenia caryophyllata and lllicum verum had higher ovicidal activity, with their LC50 values being 0. 428, 1. 605 and 2. 489 mg · ml^-1, respectively. Through GC/MS analysis, a total of 22 components were identified from C. cassia oil, among which, cinamaldehyde was the most predominant one, accounting for 92. 33% of the total. The LC50 of synthesized cinamaldehyde （97.33%） was 0.281 mg· ml^-1, being a little higher than the LC50 of C. cassia oil, suggesting that cinamaldehyde was the main oviciidal component of C. cassia oil and could replace the latter as an ovicide against harmful flies.