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natural enemies of locust 蝗虫天敌
The owl is the natural enemy of mice and rats. 猫头鹰是鼠类的克星。
Birds are the natural enemies of many insect pests(= they kill them). 鸟类是许多害虫的天敌。
The forestry administration says it plans to launch an extermination campaign that includes insecticides and natural enemies of the moths. 国家林业局说，计划进行灭虫运动，包括使用农药和白蛾的天敌。
Hurry up and grow! Workers at Taiwan Sugar raise natural enemies of the sugarcane borer. 但愿虫快长大！糖厂工人把米虫卵撒在米上。
Results The results showed that Type-C botulin had high safety without killing natural enemies of rodent. 结果C型肉毒毒素有很高的安全性,不伤害鼠类天敌;利用0。10%25、0。15%25、0。
Rachid Hanna advises farmers to use biological controls such as natural enemies of the aphids. 拉齐德汉纳建议农民们采用诸如引入蛀虫天敌的生物控制方法。
Abstract: Agasicles hygro phila is a hollow philoxeroides important natural enemies of insect feeding exclusively. 摘要：空心莲子草叶甲是空心莲子草重要的专食性天敌昆虫。
Resources of natural enemies of insect pests in apple orchard were systemally studied in apple orchards in Shanxi province. 摘要对陕西不同地区苹果园天敌昆虫进行了调查研究，结果获得天敌昆虫17种，隶属于8目11科。
One potentially cheap and self-sustaining method of halting the spread of bracken is to introduce natural enemies of the plant. 一种廉价的能终止欧洲蕨蔓延且能自我维持的潜在方法就是引进该植物的天敌。
These small insects must be destroyed.Rachid Hanna advises farmers to use biological controls such as natural enemies of the aphids. 他建议农民们采用如蚜虫的天敌这样的生物手段来消灭它们。
The results indicated that Coccinellidae and Chrysopidae as primary natural enemies of Aphis gossypii significantly reduced the aphid population in self-controlled cotton field. 结果表明，不施药棉田中草蛉和瓢虫对棉蚜有着良好的自然控制能力；
Such as all the different sorts of locust. 其中有蝗虫，蚂蚱，蟋蟀与其类，蚱蜢与其类，这些你们都可以吃。
Gan Yunxing， Xiong Jiang， Zhao Wanyuan and Liu Qirong1981 Illustrations of the Pests and Their Natural Enemies of the Crops of Yunnan Province. The Peoples Press of Yunnan， Kunming， China. 甘运兴、江、万源、起蓉198l云南省粮食作物害虫及天敌昆虫图册。云南人民出版社，昆明。
The life history, the population dynamics and the natural enemies of Pseudophacopteron canarium Yang & Li were investigated in one-thousand-acre olive orchard in Yanshou village, Putian. 本论文通过对莆田市延寿村千亩橄榄园的橄榄星室木虱种群动态和天敌种类的研究，明确了橄榄星室木虱在莆田地区的生活史、种群数量消长规律和天敌种类。
Natural enemies of Hyphantria cunea (Drury) were investigated in Qinhuangdao, Hebei Province. Two parasitoids in larva stage, 12 parasitoids in pupal stage and 2 predators (Coccinella septempunctata and Tenodera sinensis) were found. 摘要通过对美国白蛾各个发育期的天敌进行调查与研究，发现除了捕食性天敌七星瓢虫、大刀螳螂等外，幼虫期有2种寄生性天敌、蛹期有12种寄生性天敌，这为保护和利用天敌、有效控制美国白蛾提供了依据。
A cloud of locusts hit the farm. 大群蝗虫袭击了那个农场。
The results showed that the insect pest h ad eight generations or so annually in Baishan and overwinters as pupa in greenh ouse.Three natural enemies of parasitism were discovered as well. 该虫在白山地区以蛹在温室内越冬,一年约发生8代,还发现了3种寄生性天敌。
In 1927, entomologists at the CES introduced two wasps from Australia as natural enemies of a major citrus pest, the citrophilus mealybug, saving growers in Orange County $1 million in annual losses. 1927年，环境研究中心的昆虫学家从澳大利亚引入了两种黄蜂，它们是柑橘害虫粉蚧的天敌，由此挽救了橘子镇的柑橘种植者们，并且从每年的亏损中挽回一百万美元。
The niche breadths of natural enemies of the wheat aphids in wheat, barley and oat fields in Tacheng and Ili, Xinjiang Uygur Autonomous Region were estimated on the basis of investigation in 1990. 利用生态位理论，对新疆塔城、伊犁两地区麦田麦蚜主要天敌类群瓢虫类、食蚜蝇类、斑腹蝇类、蚜茧蜂类和蚜小蜂类的生态位宽度和重叠度进行了计算和分析。