水稻二化螟灾变规律与栽培因素之关系分析

Interactions between infestation regularity of Chilo suppressalis and cultivation factor.

通过对20多年的历史资料分析,近年来安徽省广德县水稻二化螟Chilo suppressalisWalker灾变规律发生了新变化:发生期推迟,发生程度加重,主害世代推后。栽培因素如种植制度的调整,优质稻品种的普及,水稻播、栽期的推迟,免耕技术的推广等与其关系密切。这些因素将继续向有利于害虫方向发展,螟虫重发仍将持续。对螟虫的预测与控制必须予以关注。

Through the analysis of historical data of more than 20 years in Guangde County of Anhui Province, it＇ s was found that the rule of Chilo suppressalis Walker infestation regularity has changed in recent years. Occurrence period is delayed, occurrence degree is depened, infestation peak is postphoned. All of the resuhes have much to do with the cultivation factor, such as the adjustment of planting institution, popularization of high quality rice, postphone of seeding time and planting time, and promotion of no-tillage technology. And those factors will still benefits for the pest and the caterpillars disaster will still continue. Therefore, we should keep paying attention to the forecast and control of C. suppressalis.