Division of Entomology and Parasitology, College of Natural Resources University of California, 94720, Berkeley, California.
J Chem Ecol. 1993 Jun;19(6):1109-18. doi: 10.1007/BF00987372.
In studies of the effects of allelochemicals or other factors on the development of different insect species, comparison of growth-inhibiting activities is difficult using the parameters currently employed. We introduce two new parameters, growth index (GI) and relative growth index (RGI), which can unify the quantification of insect development. This quantification can also eliminate the effects of different growth characteristics due to the genetic differences between insect species. By measuring growth-inhibiting effects of two phytochemicals, chaparrin and chaparrinone, on the tobacco budworm,Heliothis virescens, and the beet armyworm,Spodoptera exigua, bioassay procedures and GI and RGI calculations are demonstrated.
在研究化感物质或其他因素对不同昆虫物种发育的影响时，目前使用的参数很难比较生长抑制活性。我们引入了两个新的参数，生长指数（GI）和相对生长指数（RGI），它们可以统一昆虫发育的定量。这种定量还可以消除由于昆虫物种之间的遗传差异而导致的不同生长特性的影响。通过测量两种植物化学物质——chaparrin 和 chaparrinone 对烟草夜蛾 Heliothis virescens 和甜菜夜蛾 Spodoptera exigua 的生长抑制作用，展示了生物测定程序以及 GI 和 RGI 的计算。
