寄主植物对椰心叶甲生长发育和繁殖力的影响

研究了5种棕榈科寄主植物椰子(Cocos nucifera)、酒瓶椰子(Hyophorbe lageni-caulis)、老人葵(Washingtonia filifera)、大王棕(Roystonea regia)和槟榔(Areca catechu)未展开心叶对椰心叶甲实验种群生长发育和繁殖力的影响.结果表明:在取食不同的寄主植物心叶的情况下,椰心叶甲完成1个世代所需的时间差异显著,其中取食老人葵所需时间最长,为72.8d,取食酒瓶椰子所需时间最短,为39.8d;酒瓶椰子上的平均蛹质量较其它4种寄主植物大;取食老人葵的椰心叶甲平均产卵量最高,为157.6粒,而取食槟榔的最少,为65.2粒;取食酒瓶椰子的椰心叶甲成虫寿命为207.5d,远比寄生于其它寄主的成虫寿命长.5种寄主植物上的实验种群趋势指数分别为53.57、54.98、48.56、20.46和11.54.

Effects of host plants on development and fecundity of Brontispa longissima (Gestro)

With Cocos nucifera,Hyophorbe lagenicaulis,Washingtonia filifera,Roystonea regia and Areca catechu as test host plants,this paper studied the effects of their un-spread leaves on the development and fecundity of experimental population of Brontispa longissima.The results showed that the development duration of one generation B.longissima fed on different hosts varied significantly,with the longest(72.8 days)on W.filifera and the shortest(39.8 days)on H.lagenicaulis.The average pupa weight of B.longissima was bigger on H.lagenicaulis than on the other four host plants,and the female B.longissima had the highest fecundity(157.6 ova)on W.filifera while the lowest one(65.2 ova)on A.catechu.The longevity of B.longissima adults fed on H.lagenicaulis was 207.52 days,being significantly longer than that on the other host plants.The trend index of experimental population of B.longissima fed on the five host plants was 53.57,54.98,48.56,20.46 and 11.54,respectively.