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- How to control pests and diseases for mulberry trees in winter? 桑树冬季病虫害防治技术?
- Such substances are mainly used to control pests that infest cultivated plants and crops or to eliminate disease-carrying insects in specific areas. 主要用于控制侵扰作物的害虫或者在特定地区消灭传染疾病的昆虫。
- The understanding of the effect of insecticides on spiders in farmlands is ecologically important fur comprehensively controlling pests. 摘要农药对农田蜘蛛的生态效应是进行农田害虫综合防治的生态学基础。
- It is unavoidable to pollute farm products and environment by using chemicals to control pests. 研究表明,使用农药防虫,不可避免地对农畜产品及环境带来污染。
- The effect of the 90%wettable powder of insecticid e “Wan Ling”was used to prevent and control pests in mulberry field . 万灵农药90%25可湿性粉剂应用于桑园的害虫防治,杀虫效力高,速度快,残毒期较短,有利于养蚕用叶。
- They control pest such as snails, weevils and grasshoppers and like the sheep help with some fertilising. 它们控制害虫,如蜗牛、象鼻虫和蝗虫,与羊一样帮助施肥。
- Agricultural chemicals refer to the medicament used to control pest for agriculture and forestry, weeding and regulating the growth of plants. 农药是指用于农林业防治病虫害、除草及调节植物生长的药剂。
- Results The cypermethrin preparation could control pests for 2 months,but the effective duration of cypermethrin confected by chitosan was more than 3 months. 结果单纯氯氰菊酯制剂的持效时间为2个月左右,壳聚糖复配的氯氰菊酯制剂的持效时间至少为3个月。
- In controlling pests posing threats to public health, the Department adopts an integrated approach, putting equal emphasis on effective use of pesticides and continuous improvement in environmental hygiene. 为了对付影响公众衞生的虫鼠,本署采用综合防治方法:除使用有效的除害剂外,还不断改善环境衞生。
- Insecticide: Any of a large group of substances used to kill insects. Such substances are mainly used to control pests that infest cultivated plants and crops or to eliminate disease-carrying insects in specific areas. 杀虫剂:用来杀死昆虫的有毒物质。主要用于控制侵扰作物的害虫或者在特定地区消灭传染疾病的昆虫。
- Insecticide: Any of a large group of substances used to kill insects. Such substances are mainly used to control pests that infest cultivated plants and crops or to eliminate disease-carrying insects in specific areas. 杀虫剂:用来杀死昆虫的有毒物质。主要用于控制侵扰作物的害虫或者在特定地区消灭传染疾病的昆虫。
- Therefore, cultivating resistant rice and making use of predatory insect were considered as two effective measures, the basic demand of IPM is bringing into play controlling pest to cooperate with the two measures. 因此,培育抗性品种与利用天敌作为控制害虫的两大重要措施,发挥两者对害虫的协同控制作用是害虫综合治理的基本要求。
- technique for controlling pests & diseases 病虫害防治技术
- The Application of Insect Virus in Controlling Pest 昆虫病毒在害虫生物防治中的应用
- Biological control pest missiles 生物灭虫弹
- Industry rarely thrives under government control. 在政府控制之下工业很少会发达。
- Those rebellious teenagers are hard to control. 那些反叛的青少年很难管教。
- Pollution control has cleared the air. 污染管制已净化了空气。
- An ASCII control character, end of medium. 一种ASCII码控制字符,媒体结束符。
- The firemen were unable to control the blaze. 消防队员无法控制这场大火。