查询词典 Insect-Eating

Its insecticidal active ingredients are sesquiterpenoid polyol esters with a dihydroagarofuran structure. These compounds are stable to light, heat, and pH, and exert a narcotic and toxic poisoning action. Celastrus angulatus contains a plant-origin insecticide with a unique mechanism of action. Celangulins, a 0.2% emulsifiable concentrate has already been developed for insect control.

是我国广泛分布的一种杀虫植物，其杀虫有效成分基本上均是以二氢沉香呋喃为骨架的多元酯类化合物，对光、热和pH值均稳定，对害虫主要表现为麻醉和毒杀作用，苦皮藤是一类作用机理独特的植物源杀虫剂，在其实际杀虫的应用上，已经开发出了0.2%苦皮藤素乳油。

The active compound Celangulin-V, which is the main active compound against insect pest from Celastrus angulatus Max, was modified at its 6-OH and the core structure β-dihydroagarofuran polyol of Celangulins from the basic hydrolysis of the extract of the root bark of Celastrus angulatus Max was modified by combinatorial chemical method.

主要结果如下： 1、合成了苦皮藤素V6-乙酯、6-烯丙基醚和6-酮等衍生物，通过NMR方法鉴定了化合物的结构，经文献检索均为新化合物，生测结果表明酮衍生物丧失了杀虫活性，乙酯衍生物与苦皮藤素V活性相当，醚衍生物较苦皮藤素V活性提高11倍。

Anoplophora glabripennis Motshulsky (Coleoptera: Cerambycidae) is one of the most destructive insect borers of poplar trees in China. In recent years millions of poplar trees were damaged to death or near death in"Three-North Area", which caused heavy losses economically, ecologically and socially. Through the study on host selecting behaviors and behavioral responses to plant volatiles of A.

中文题名光肩星天牛对寄主植物挥发性物质的行为反应及作用机理的研究副题名外文题名 Behavioral responses and mechanism of Anoplophora glabripennis to host volatile compounds 论文作者李建光导师尹伟伦骆有庆金幼菊教授学科专业植物学研究领域\研究方向植物与昆虫的关系学位级别博士学位授予单位北京林业大学学位授予日期2001 论文页码总数129页关键词森林病虫害光肩星天牛寄主选择挥发性物质馆藏号BSLW /2003 /S763 /6 光肩星天牛Anoplophora glabripennis是我国最重要的一种林木蛀干害虫。

The percentages of insect fragment occurrence of various body parts were: antenna, 34.5%; mandible, 8.8%; legs, 43.4%; wings, 5.3%; cerci, 1.8%; and ovipositors, 0.9%.

昆虫碎片经鉴定分析后，各目昆虫碎片样品前三目之百分比分别为，直翅目47.8%、鞘翅目21.7%、革翅目15.2%。

However, the food composition of the M. albus with body length more than 100mm were quite consistent, with Chironomidae, Oligochaeta, Pheretima, Cladocera, Copepoda and insect larvae as the major food items.

而全长101-200mm的幼鳝及全长大于200mm的成鳝的食性，随全长变化相对稳定，且幼鳝和成鳝的食谱基本相同，其主要食物组成均包括摇蚊幼虫、水生寡毛、蚯蚓、昆虫幼虫、枝角类和桡足类等。

The biological and ecological characteristics of Chironomus kiiensis Tokunaga, an important insect pest in municipal water supply system were studied.

本文首次在城市供水系统研究了花翅摇蚊的室内饲养，并且从物理防治、化学防治、生物防治不同角度研究了花翅摇蚊的防治措施。

In consideration of the natural suppression of Chrysopa septempunctata Wesmael to the thrips populations,the ET might relax to 624 insect-days,i.e.the fourth level of injury with the injured area about 1/2 to 3/4 of the whole leaf and its edges curled upward.

考虑大草蛉对桑蓟马的捕食作用，则桑蓟马防治指标可定为4级受害水平，即叶片受害面积占全叶的1/2～3/4，叶缘向上卷起。

Any of numerous small, rounded, usually brightly colored beetles of the family Coccinellidae, often reddish with black spots and feeding primarily on insect pests, such as scale insects and aphids.

瓢虫任一种小而圆的通常具有鲜艳色彩的瓢虫科的甲虫，体常呈红色并带有黑色斑点，主要以介壳虫和蚜虫等害虫为食

All of the McAbs only reacted with the collembola while not cross-reacted with other insect pests and predators.

它们只与弹尾虫发生反应，不与稻田中被检测的其他昆虫种类和蜘蛛发生交叉反应。

Collembola, Protura and Diplura are not only important groups of the soil animal biodiversity, but also one of the key groups in studying the evolution arthropod, because their phylogenetic position are critical to the understanding of the evloution of insect orders.

跳虫、原尾虫和双尾虫不仅是土壤动物多样性研究的重要类群，又是节肢动物低等类群向陆生有翅昆虫演化的中间环节，是节肢动物进化研究中的关键类群之一。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。