北京地区水稻种植面积一般在 1 .67万ｈｍ2 左右。影响水稻生产的稻蝗日趋严重 ,年发生面积 1 .3 3万ｈｍ2 以上。虽然农民常常使用高毒、广谱性农药如有机磷、菊酯类等防治多次 ,但防治效果不理想 ,且造成大量资金和人力的浪费 ,又杀伤天敌、破坏生态平衡 ,还造成对环境的污染 The rice planting area in Beijing is generally around 16,700 hm2. Rice locusts that affect rice production are becoming more and more serious with an annual area of ​​over 13 300 hm2. Although peasants often use highly toxic and broad-spectrum pesticides such as organophosphate and pyrethroid for many times, their prevention and control effects are not satisfactory and cause a lot of financial and manpower waste, as well as killing natural enemies and damaging their ecological balance, Pollution