七十年代以来,稻纵卷叶螟已成为我县水稻常发生的主要害虫。不仅发生面积大,而且为害严重,损失大。我县近二十年来,因受稻纵卷叶螟为害,损失稻谷累计2.5亿公斤左右,经济损失2亿元左右。造成为害的关键在于基层预报和防治工作不及时。要做好基层稻纵卷叶螟的预报工作,需抓住如下 Since the seventies, rice leaf roller has become a frequent perennial rice in our county. Not only occurred in a large area, but also serious damage, loss. In the past two decades, my county has been damaged by the rice leaf roller, losing a total of 250 million kilograms of paddy and has an economic loss of about 200 million yuan. The key to causing harm lies in the grass-roots forecast and prevention and control work is not timely. To do grass-roots rice leaf roller forecast, we must seize the following