论文部分内容阅读
稻瘿蚊是山区晚造水稻的主要害虫之一,该虫以低龄幼虫在田边杂草、再生稻等寄主越冬,第2年4月中、下旬羽化繁代,全代历期25~30d。防治上,重点抓好主害代第四、第五代的预测预报和防治,采取“除、避、治”的综合防治措施。细坳镇地处粤东北山区,稻瘿蚊是为害我镇晚稻的主要害虫之一。据查历史资料可知,20世纪90年代中期只发生2 000hm2,以后逐年上升,2006~2008年连续3年大发生,2008年发生面积达到500hm2,并造成一定损失。2008年后,在摸清此虫发生为害规律的基础上,采取综合治理措施,有效地将为害损失率控制在3%以下。
Rice gall midge is one of the major pests of late rice in the mountainous area. The larvae overwinter by the young larvae in the fields such as weeds and ratoon rice, . On prevention and control, we should focus on the prediction and prevention and control of the fourth and fifth generations of the main victims, and take the comprehensive prevention and control measures of “removing, avoiding and controlling”. Fine Au town is located in northeastern Guangdong mountains, rice gall midge is one of the major pests damage late rice in our town. According to the historical data, only 2 000 hm2 occurred in the mid-1990s and then increased year by year. This occurred for three consecutive years from 2006 to 2008, with an area of 500 hm2 in 2008 and a certain loss. After 2008, on the basis of finding out the pest occurrence rules of this pest, comprehensive control measures are taken to effectively control the damage loss rate below 3%.