随州市稻飞虱将中等偏重发生
2010
07/26
21:27
1643
据市植保站22日调查分析，今年我市三代稻飞虱将中等偏重程度发生，发生面积20至50万亩，其中东南部发生情况较为严重，最佳防治时期为7月下旬至8月上旬。
据田间调查，广水市太平乡稻飞虱百蔸虫量平均为3275头，最高为5300头，高于曾都（平均540头）、随县（平均136头）和防治指标（1200头）。市植保站专家介绍，近期我市连续几次强降雨，对稻飞虱的迁入极为有利；目前中稻长势好，肥力足，下一阶段阴雨天多，有利于稻飞虱的发生和蔓延。
据悉，今年三代稻飞虱的最佳防治时期是7月下旬至8月上旬，以水源条件好、长势旺、偏施氮肥、晒田不彻底的田块和优质稻为重点防治对象，达到防治标准的要及时进行化学防治，药剂选用为：（1）25%噻嗪酮或25%吡蚜酮亩用20-30克；（2）25%噻异亩用60-80毫升；（3）48%毒死蜱亩用60-80毫升。
来源：
随州日报社
发布人：
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