台州西兰花甜菜夜蛾种群数量变动规律研究  

Spodoptera exigua population dynamics of broccoli in the Taizhou area

作　　者：汪恩国 刘伟明[2] 

机构地区：[1]浙江省临海市植物保护站,临海317000 [2]浙江省台州科技职业学院,黄岩318020

出　　处：《上海农业学报》2014年第6期57-60,共4页Acta Agriculturae Shanghai

基　　金：台州市科技计划项目"西兰花安全高效生产关键技术研究与集成应用"(071TG04)

摘　　要：为了探索台州西兰花甜菜夜蛾种群数量年度变动规律与季节性消长规律,2002—2012年应用性诱剂监测方法进行定点系统监测。结果表明:台州西兰花近11年来甜菜夜蛾大发生频率为27.3%,其年度种群数量呈螺旋式冲高回落变化特征,其季节性数量消长为自强而弱振荡变化;气温、日照、雨量三要素对季节性数量变动存在显著相关关系,甜菜夜蛾7—9月份高温季节为盛发为害期,10—12月份随旬平均气温下降而渐趋减弱。本研究模型可提高西兰花生长期甜菜夜蛾预测预报或预警水平,对决策防治具有指导意义。During the years from 2002 to 2012,gyplure monitoring method was used to carry out systematical monitoring at a certain site in order to explore the regularity of harm that Spodoptera exigua has done to broccoli and thus the annual population fluctuation of Spodoptera exigua as well as seasonal population fluctuation regulation could be drawn.The results showed that in the past 11 years,the occurrence frequency of Spodoptera exigua was 27.3%,and there was a spiral fall in population quantity.Its seasonal population quantity fluctuation regulation indicated weakening oscillation changes with daily average functional model.There existed a remarkable correlation between temperature,sunlight,rainfall and seasonal quantity variation,which showed that the high-temperature days during July and September were a high-frequency occurrence period for Spodoptera exigua while they were declining from October to December with the decreasing temperature.The mentioned models could be used to forecast Spodoptera exigua in the growth period of broccoli,and finally new precautions could be adopted.

关 键 词：西兰花 甜菜夜蛾 种群动态 影响因素 

分 类 号：S436.35[农业科学—农业昆虫与害虫防治]