茶尺蠖人工饲料的研究

STUDIES ON THE ARTIFICIAL DIETS FOR REARINGTEA GEOMETRID (ECTROPIS OBLIQUAHYPULINA WEHRLI)

本文报道饲养茶尺蠖(Ectropis obsiqua hypulina Wehrli)的5种人工饲料及其饲养方法.5种人工饲料均可用于大规模饲养一代幼虫。其中62号配方可用于续代饲养,在实验室内饲养5代的结果表明,效果良好,在饲料成分的加工、配制及饲养方法等方面,较前人有相当大的改进,因而叶因子用量减少,幼虫历期缩短.用人工饲料饲养的幼虫历期为13-20天,基本接近以茶叶饲养的对照(11-18天).实验结果还表明饲料含水量、饲养方法、饲养密度和添加饲料的次数不同,对茶尺蠖的生长发育有明显的影响.初龄幼虫用平面培养基倒置饲养和高龄幼虫用片状饲料正置饲养为最佳方法.

Five formulae of artificial diets for rearing tea geometrid Ectropis obliqua hypulina Wehrli(Lepidoptera: Geometridae)have been screened.All of them can be used for the mass-rearing,and four of them(No.9,No.52,No.54, No.85)for rearing one generation at least,and one(No.62)for continual rearing.The results of continual rearing for several generations show that the duration of larva stage on No.62 diet is 13-20 days,very close to that on tea(11-18 days),and the pupal weight(♀)on diet is higher than that on tea.The methods of rearing and making up of the diet have been improved.The water content of the diet,methods of rearing,rearing density,and times of adding diet have significant effects on the larval growth and development.The experiment has proved that the larvae grow best with 75.57% water content of diets,the rearing density of 15-20 larvae in a 9cm dish and diet ad- ding once per day.It has also proved as a good rearing method whcn the young-instar larvae grow on the plane medium and the dishes are put upside down,and the old-instar larvae grow on the sliccd diet in dishes.