Sáenz-de-Cabezón F J, Pérez-Moreno I, Zalom Frank G, Marco V
Department of Entomology, University of California, Davis 95616, USA.
J Econ Entomol. 2006 Apr;99(2):427-31. doi: 10.1603/0022-0493-99.2.427.
The effect of the chitin synthesis inhibitor lufenuron was evaluated against different developmental stages of Lobesia botrana Den. & Schiff. (Lepidoptera: Tortricidae). Lufenuron fed to adults at 10 ppm reduced their fecundity and fertility, but it did not affect adult longevity. High activity was observed against L. botrana eggs with greater effect on 1-d-old eggs than on the other age classes and on eggs treated by direct contact rather than those laid on a previously treated surface. Eggs laid by treated adults showed the same effects during development as eggs treated by contact or those laid on a treated surface. Larvae that emerged from treated eggs could not perforate grape berries. Administered into the diet, lufenuron had a larvicidal effect, resulting in similar LC50 values for different instars: 0.07 ppm for first instars, 0.08 ppm for third instars, and 0.11 ppm for fifth instars. None of the larvae treated with sublethal concentrations throughout their life emerged as adults at the highest concentration (0.08 ppm), and only 70% emerged at the lowest concentration (0.0025 ppm).
评估了几丁质合成抑制剂虱螨脲对葡萄小卷蛾Den. & Schiff.（鳞翅目：卷蛾科）不同发育阶段的作用。以10 ppm的剂量喂食成虫，虱螨脲降低了它们的繁殖力和生育力，但不影响成虫寿命。观察到对葡萄小卷蛾卵有高活性，对1日龄卵的影响大于其他龄期的卵，且对直接接触处理的卵的影响大于产在先前处理过表面上的卵。经处理的成虫所产的卵在发育过程中表现出与接触处理的卵或产在处理过表面上的卵相同的效果。从处理过的卵中孵化出的幼虫无法穿透葡萄浆果。将虱螨脲添加到食物中具有杀幼虫作用，不同龄期的半数致死浓度（LC50）值相似：一龄幼虫为0.07 ppm，三龄幼虫为0.08 ppm，五龄幼虫为0.11 ppm。在整个生命周期中用亚致死浓度处理的幼虫，在最高浓度（0.08 ppm）时无成虫羽化，在最低浓度（0.0025 ppm）时只有70%羽化。
