应用生态学方法控制稻秆潜蝇为害研究初报

Utilization of the ecologic methods to control Chlorops oryzae Matsumura

研究表明，在福建尤溪，北纬２５．８－２６．４度，东经１１７．８－１１８．６度区域内，从６４０ｍ－８４０ｍ的中、高海拔稻区，稻秆潜蝇第二代幼虫化蛹以历期为主，水稻抽穗时幼虫历期天数不到则不会化蛹，而水稻齐穗后未化蛹的幼虫，一部分因无食料被逼外爬不能成蛹，大部分老熟幼虫能缓慢兑变成蛹，但多因化蛹迟，水稻收割前来不及羽化，而不能成为有效虫源。应用生态学方法，推广旱育秧提早播种，统一调整控制单晚抽穗成熟时间，并适时早收割，创造不利第二代幼虫化蛹和蛹羽化的稻田生境，使第三代越冬虫口自然大幅度锐减，是断源治本最经济、安全、有效的生态控害新途径。

The studies showed that pupating of the 2nd generation larva of Chlorops oryzae Matsumura is depended on its complete development at the rice fields of 640-840 m above sea level in Youxi County (25.8-26.4 N, 117.8-118.6E), Fujian Province, China. If the larva development is incomplete, the larvae couldn't pupate at rice heading period. After rice head sprouting, some of un-pupating larvae had to crawl out and couldn't pupate,and most could pupate slowly but didn't emerge before rice-cutting. So the ecologic methods used to control Chlorops oryzae Matsumura, such as seed sowing before the due date, regulating maturity and cutting in advance, were the economy, safe and effective ways for ecologic control.