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- The population density of the main insect pests peaks from June to September,the population quantity of the main dominant species changes discontinuously from season to season. 主要优势种的数量随季节变动表现出不连续特点。
- Byctiscus ulmi is one of the main insect pests in Weeping Elm of Xining region. The insect pest is happened a generation in a year in Xining region. 14.8 ovums were borthed by a female pest. 榆叶象甲是西宁地区垂榆上的主要害虫之一;该虫在西宁地区每年发生一代;每头雌虫平均产卵量为14.;8粒;产卵部位集中于叶背;卵期8d左右;幼虫历期25d左右;老熟后在叶柄基部作茧化蛹;蛹期16d左右;从9月下旬起成虫在枯枝落叶层内进入越冬状态。
- Comprehensive Control of Main Insect Pest of Rice 水稻主要病虫害综合治理
- Main Insect Pests Feed on the Rapid-Growing Poplar and Its Control 速生杨树的主要虫害及防治技术
- Main Insect Pests of Blackberry and Its Control in Nanjing 南京地区黑莓主要害虫及其防治措施
- Chemical control techniques to main insect pests of malus pumila 苹果主要害虫化学防治技术
- Main Insect Pest of Maize and Prevention and Control Technique 玉米主要病虫害及其防治技术
- A Primary Research on the Distribution Law of the Main Insect Pest to T. Repens 白三叶草主要虫害发生规律的初步研究
- Investegat on Main Insect Pests and Their Occurrence Situations of Garden Trees in the Northern Suburb of Xining City 西宁北郊主要园林树种害虫发生危害情况的调查
- SPECIES AND FIELD POPULATION DYNAMIC OF MAIN INSECT PESTS AND THEIR NATURAL ENEMIES ON GARDENIA JASMINONIDES ELLIS 红栀子主要害虫与天敌种类及田间种群动态研究
- The insecticide will kill off the insect pests. 这情形剂可消灭害虫。
- Study on theIntegrated Management for Main Insect Pests of Crisp Pear and Its Application in Xi County Experiment Region 隰县试区酥梨主要害虫综合治理研究与应用
- Main Insects Pest of Chinese Cabbage and its Control Measures 大白菜主要虫害及防治措施
- An insect pest fatal to cotton had struck the crop. 棉花遭受了一种致命的虫害。
- The severe frost kill off most of the insect pest. 严霜杀死了大多数害虫。
- DDT sprayed into the air kills mosquitoes and other insect pests. 喷射到空气中的DDT能杀死蚊子和其他有害昆虫。
- Insecticides are widely used for controlling most insect pests. 杀虫剂广泛应用于防治大多数害虫。
- Crowd out less hardy plants and act as hosts to many insect pests. 黄色菊花通常令人生厌,它挤走不那么顽强的植物,并找来很多害虫。
- Potential Effects of Climate Change on Agricultural Insect Pests. 气候变化对农业害虫的潜在影响。
- Main insect pests 主要害虫