黄钩尺蛾在四个茶树无性系品种上的生长和存活(英文)

Growth and survival of a geometrid defoliator Hyposidra infixaria Walker ( Lepidoptera: Geometridae) on four clonal varieties of tea

在实验室条件下,对食叶害虫黄钩尺蛾Hyposidra infixaria Walker在4个茶树Camellia sinensis无性系品种(TV1,TV9,TV25和Teenali17)上的生长和存活进行了研究,以确定其最适合寄生的茶树无性系品种。结果表明:在TV25上的黄钩尺蛾幼虫期(15.78d)比在TV1(18.14d),TV9(18.00d)和Teenali17(17.00d)上显著缩短。黄钩尺蛾按幼期龄数分为5龄型和6龄型两类。6龄型幼虫在TV25上的发生率显著高于其在其他3个无性系品种上的发生率。在TV25上黄钩尺蛾幼虫和蛹的体重也显著高于在其他3个无性系品种上的。同样地,以TV25为食的黄钩尺蛾未成熟阶段的存活率显著高于其以其他3个无性系品种为食的存活率。基于生长参数和存活率,我们发现TV25是黄钩尺蛾最适合寄生的茶树无性系品种。

The growth and survival of a geometrid defoliator,Hyposidra infixaria Walker were studied on four popular clonal varieties （ TV1,TV9,TV25 and Teen ali 17 ） of tea Camellia sinensis in the laboratory with an aim to find out the most suitable clonal variety of tea for the insect. The results showed that the larval period of H. infixaria on TV25 clone was significantly shorter （ 15. 78 d） than that on TV1 （ 18. 14 d） ,TV9 （ 18. 00 d） and Teen ali 17 （ 17. 00 d） clones. There were two variations in the larval instar numbers,those being the five-or six-instar type. The incidence of the six-instar type fed on TV25 was higher than those fed on other three clones. Larval and pupal weights were also significantly higher on TV25 than other three clones. Similarly,the survival of immature stages of H. infixaria fed on TV25 was significantly higher than other three clones. Based on growth parameters and survival,TV25 was found to be the most preferable clonal variety of tea for H. infixaria.