江苏高淳地区褐飞虱灾变规律及防控对策

Disaster Regularities and Control Measures against Brown Plant--hopper in Gaochun District

对高淳区褐飞虱测报资料进行分析表明,2005年以来褐飞虱暴发频率增加,危害损失严重;迁入量由高趋低,呈波浪态势;短翅成虫出现早、比例高,穗期虫量上升快;七(4)代卵量高,低龄若虫盛发期长;地区间、田块间差异性大等特点,其原因与气候适宜、寄主品种有利、抗药性增强、防治水平差异等因素相关。在此基础上提出要加强虫情监测,注重治前控后,选用正确药剂等防控对策。

Forecast data of brown plant-hopper in Gaochun District were analyzed, and results showed that since 2005, the outbreak frequency of brown plant-hopper has increased, causing serious harm and loss？ its immigration trend changed from the high to the low, showing a wavy situation？ the short winged adults emerged early, with high proportion, and the worm rose fast at the heading stage？ the high amount of eggs occurred in the seventh（4） generation, the young nymph with long booming period？ big differences happened between different region and plots. We found its causes were related to suitable climate, favorable host species, enhanced resistance, different prevention and controlling levels, and other factors. On this basis, we proposed to strengthen the insect monitoring, focus on pre-treatment control, select the right pesticides, and conduct other prevention and control measures.