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The larval parasitism of DBM by this parasitoid in the field usually ranges from 40 % to 70 %, with the highest parasitism rates of more than 90%, indicating high practical potential of this parasitoid to be integrated in the management of DBM....

作者在室内对采自云南的半闭弯尾姬蜂的生物学、生态学特性进行了系统、定量的研究,旨在为定量评估该蜂的控害潜能及保护利用、研究大田小菜蛾幼虫寄生蜂群落结构变化机制提供科学依据。

Host plants affected the survival, development time and reproduction of P.xylostella and indirectly affected the survival, development time, fecundity and sex ratio of the parasitoid.

6小菜蛾及菜蛾绒茧蜂的生存、发育、繁殖等均不同程度地受寄主植物的影响,小菜蛾成虫期的产卵嗜好性并不反映植物对其幼虫期的相对适合度。

After 4 generations treatment with tannic acid, the larvae of cotton bollworms were more susceptible to deltamethrin, but had no significant difference in susceptibility to parathion methyl.

单宁酸处理的第4代幼虫对溴氰菊酯的敏感度有增加的趋势,对甲基对硫磷的敏感度没有明显改变。

In our experiment, we found two abnormal phenotypes that one only the last three segments develop into pupa, but the other segments are still keep the larva characters; another sample has differently develop speed between abdomen and backside, which resulted in the back develop into pupa but the abdomen were still the larva characters. When we add Az in the feed of injected EcR-dsRNA samples, in the 13 live larvae we found that 6 have the abnormal proleg phenotypes.

在另一组注射EcR-dsRNA以后通过浸叶法添食不同浓度的印楝素,在10ppm处理组存活的13个个体中有6个出现特异表型,其中两个幼虫为不完全蜕皮,尾部体节无法蜕皮导致发育受阻;另外发现4个供试虫体发育至五龄时出现腹足缺失表型,其中有两个是腹足几乎全部缺失,腹足应该生长的部位只有少数几个突起,没有发育成形的腹足;一个出现左侧腹足完全缺失,右侧第二腹足缺失表型;另一个个体只缺失了左侧最后一个腹足。

Assulta was studied in the present paper. Based on the successful reciprocal crosses, sex ratio and fertility of the hybrids in larvae, pupae and adults were investigated. In addition, the physiological mechanisms and genetic basis of host plant ranges of H.

在此基础上,利用解剖和观察等方法对子一代幼虫、蛹和成虫的性别比例和可育性进行了较为系统的研究;并利用比较的方法对棉铃虫和烟青虫食性广度的生理机制和遗传基础进行了初步研究。

An Asian silkworm,the larva of a large saturniid mothAntheraea paphia,that produces a coarse brownish or yellowish silk.

柞蚕一种产于亚洲的蚕,是一种大型的天蚕蛾(意大利大蚕蛾花大蚕蛾属)的幼虫,能吐出褐色或黄色的粗丝

An Asian silk worm,the larva of a large saturniid mothAntheraea paphia,that produces a coarse brownish or yellowish silk .

柞蚕一种产于亚洲的蚕,是一种大型的天蚕蛾(意大利大蚕蛾花大蚕蛾属)的幼虫,能吐出褐色或黄色的粗丝

In the spring of 2002, 11 different shell colors lines including 4 orange ,3 purple and 4 white were successfully established by using the mate strategy of self-fertilization.

利用壳色可遗传的特性,采用自体受精的交配策略,于2002年成功地建立了4个橙色、3个紫色、4个白色等3类共11个海湾扇贝自交系,并对不同家系的受精卵大小、胚胎孵化率及幼虫、稚贝和养成阶段的生长速率与存活率等生物学参数进行了比较。

The supersession of the new and old root was related with the peak of the second stage juvenile (J2). The temporal and spatial dynamics of invasion for the SCN had closely related with the soybean root development.

首次提出大豆胞囊线虫二龄幼虫高峰的出现与大豆根系新老更替密切相关的观点,并研究了线虫的侵入和分布与根系发育的时空动态。

Benthic macroinvertebrates were studied in 5 sampling sites. The results indicated the species were becoming little and little. We only inspected 2 species Tubifex sp and Tokunagayasyrida akamus, which are all eutrophicational designate species.

底栖大型无脊椎动物种类逐年减少的,2002年仅观测到寡毛类的正颤蚓和摇蚊幼虫类的大红德永摇蚊,它们均是富营养型水体的指示种类。

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但我们并不在乎沙场中的显露。

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啊!不用提了。提到肉,真是糟透了。

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