灰飞虱种群数量变动规律与模型测报技术研究

A study on the population fluctuation and the forecasting models of Laodelphax striatellus in rice fields

根据临海市1986-2005年灰飞虱成虫灯下诱集资料和田间测报调查情况,阐述灰飞虱田间消长动态,分析灰飞虱种群变化特征和运动规律,以及主要影响因子,并运用灰飞虱种群运动原理,创建了7种灰飞虱种群数量预测的数学模型,具有良好应用效果。

Based on the data of Laodelphax striatellus adults captured by light traps in Linhai City day by day from April 10 to October 15 during 1986--2005, and the population quantities of L. striatellus monitored in fields since 1998, the results showed that May--July was the most important occurrence period of L. striatellus, since its viru liferous adults and larvae infected the rice seedlings with RBSDV and RSV during this period. The population dy namics of L. striatellus in fields was also reviewed, and the population fluctuation characteristics, movement regu larity and main influencing factors were analyzed. Seven forecasting mathematical models of L. striatellus population quantity were established by using population variation theory, which could improve the level in early warning of the rice diseases.