长角血蜱性信息素2,6-二氯酚的含量变化及生物学作用长角血蜱性信息素2,6-二氯酚的含量变化及生物学作用

QUANTITATIVE VARIATION OF THE SEX PHEROMONE 2,6-DICHLOROPHENOL, OF HAEMAPHYSALIS LONGICORNIS AND ITS ROLE IN BIOLOGY

本文用气相色谱法对长角血蜱饱血若虫，饥饿、吸血后和饱血后成虫盾窝腺中性信息素２，６－二氯酚（２，６－ＤＣＰ）含量进行了测定：２，６－ＤＣＰ仅存在于成虫，若虫中检测不到；雄虫只在吸血期产生２，６－ＤＣＰ，但含量甚微（约１ｎｇ／只），其生物学作用尚不清楚；雌虫性信息素的生物合成开始于成虫蜕出后４—５ｄ，之后其含量不断增加，吸血前后达到高峰，２，６－ＤＣＰ最高含量为１１．１２ｎｇ／只；吸血后３ｄ开始下降，但吸血后３—５ｄ即交配前保持在一较恒定水平。盾窝腺中２，６－ＤＣＰ含量的下降与雌虫不断释放以吸引雄虫有关，此期内并有新的信息素合成；吸血后６—７ｄ急剧下降；饱血后下降为零。本文用气相色谱法对长角血蜱饱血若虫，饥饿、吸血后和饱血后成虫盾窝腺中性信息素２，６－二氯酚（２，６－ＤＣＰ）含量进行了测定：２，６－ＤＣＰ仅存在于成虫，若虫中检测不到；雄虫只在吸血期产生２，６－ＤＣＰ，但含量甚微（约１ｎｇ／只），其生物学作用尚不清楚；雌虫性信息素的生物合成开始于成虫蜕出后４—５ｄ，之后其含量不断增加，吸血前后达到高峰，２，６－ＤＣＰ最高含量为１１．１２ｎｇ／只；吸血后３ｄ开始下降，但吸血后３—５ｄ即交配前保持在一较恒定水平。盾?

The sex pheromone, 2,6 dichlorophenol (2,6 DCP), in foveal glands of nymphs; unfed, attached and engorged adults of Haemaphysalis longicornis were detected by GC. 2,6 DCP only existed in adults and was undetectable in nymphs. Males produced 2,6 DCP only during the feeding period, but the quantity was very low (about 1ng/ind.) and its biological role was unclear. The biosynthesis of 2,6 DCP of females occured on the 4th—5th day after moulting from nymphs. Later, it increased continuously and reached a peak (11 12ng/ind.) just before and afer feeding. On the third day after feeding, it began to decline, but maintained at a relatively stable level. This phenomenon implied that the release and new biosynthesis of 2,6 DCP took place during this period. On the 6th—7th day, it declined significantly and no 2,6 DCP existed i n foveal glands after engorgement