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二化螟是江西水稻主要害虫之一,一年发生三至四代,一般赣北三代;赣中以四代为主,部份地区三代;赣南有完整四代;但在赣中北海拔500—800公尺山区,仅发生二代。二化螟的发生,过去以一、二代为主,属二代多发型,但近几年急剧上升,三、四代亦发生多,危害重,部份地区超过了三化螟危害。为了探讨此虫的发生规律和防治措施,笔者搜集近几十年来二化螟有关资料,试就二化螟发生动态、消长因子和防治措施等问题作一综述,以供参考。
Chilo suppressalis is one of the major rice pests in Jiangxi Province. It occurs three to four generations a year, usually for three generations in northern Jiangxi Province. The fourth generation is dominant in Jiangxi Province and three generations in some areas, while the fourth generation in southern Jiangxi Province. However, -800 meters mountain, only the second generation. Chilo suppressalis occurred in the past to one or two generations, is a second generation and more hair, but in recent years rose sharply, three or four generations also occurred more serious harm, in some areas more than the three stem borer damage. In order to explore the law of occurrence and control measures of this pest, the author collected relevant data of Chilo suppressalis in recent decades and tried to summarize the occurrence, occurrence and growth of Chilo suppressalis and other control measures, for reference.