虫口 meaning in English
insect population
larval population
population
Examples
- He used aphid fecundity data to elucidate the theoretical effects of antibiosis on insect population dynamics .
他利用蚜虫繁殖力资料说明了抗生作用对虫口动态的理论效应。 - Studies on the distribution of hylobitelus xiao zhang in the forest of pinus elliottii
萧氏松茎象在湿地松林中的虫口分布研究 - Want to have consideration to findings , circumstance of fall victim of density of the mouth that be like bug , crop ( index of be murdered rate , be murdered , loss late ) , computation of result of test of field drug effect
对调查结果要进行计算，如虫口密度、作物受害情况（被害率、被害指数、损失率） 、田间药效试验结果计算等。 - So far the chemical controls are still the major measures taken in locust abatement programs in china . in spite of the effectiveness and convenience , the frequent use of insecticides both in quantity and variety has caused a series of problems like locust resistance development , increased control difficulty and rising cost
我国目前控制蝗虫危害的手段主要是采用化学药剂来降低虫口密度，化学防治虽然具有快速、高效、使用灵活等优点，但是随着农药品种及数量的增加和无限制地使用农药，会导致引起蝗虫的抗药性、农药的效能降低、农药生产成本增加等一系列问题。 - According to basic principle and application experience of black light lamp , the trapping lamps were opened out using the principle of wave , color and taste to trap insect pests imago with the electric networks of frequently vibration and high voltages , it can trap many species and amounts of insect pests , reduce amounts of field ovum , greatly reduce insect pests density , save energy , have low lost , little harm to natural enemy and persons and livestock , have remarkable economic , ecological and social efficiency
摘要借鉴黑光灯的基本原理和应用经验，再配以频振高压电网触杀的频振式杀虫灯，诱集的害虫种类多、数量大，既大幅度降低了田间落卵量，又显著减少了虫口密度；节能省电，成本低；叶昆虫天敌杀伤力较小，对人畜安全，不污染环境，具有显著的经济、生态和社会效益。