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银川平原小麦主要害虫的风险性评估与种群动态

发表时间:2011-10-15  浏览量:1330  下载量:582
全部作者: 卢纯,关晓庆,王颖,赵紫华,贺达汉
作者单位: 宁夏大学农学院
摘 要: 应用小麦害虫风险评估体系的2亚体系、5方面、14个指标的综合评价系统,并同时运用害虫风险指数法与经验公式法对宁夏不同地区春小麦主要害虫进行风险性分析。分析结果表明:麦长管蚜[Sitobion avenae(Fabricius)]、麦二叉蚜(Schizaphis graminum)、禾缢管蚜[Rhopalosiphum padi(Linnaeus)]为频发性成灾害虫,麦红蜘蛛[Pentfaleus major(Duges)]、小麦吸浆虫[Sitodiplosis mosellana(G6hin)]、粘虫[Mythimna separate(Walker)]为偶发性成灾害虫;对小麦害虫亚群落的分割为最优3分割,分别为萌芽期(5月15日以前)、指数期(5月15日至6月10日)、衰退期(6月10日以后),频发性成灾害虫的种群动态表明每年只有一个指数增长期。由此确定萌芽期中后期至指数期前期为最佳防治阶段,是控制害虫最有效与最重要的时期。
关 键 词: 农业昆虫与害虫防治;风险性评估;麦田;成灾性害虫;最优分割;防治策略
Title: Risk assessment and population dynamics of wheat pests in Yinchuan plain
Author: LU Chun, GUAN Xiaoqing, WANG Ying, ZHAO Zihua, HE Dahan
Organization: College of Agriculture, Ningxia University
Abstract: This paper used a comprehensive assessment system, which had 2 sub-systems, 5 respects and 14 indicators. The method of risk assessment indices and the method of experience formula were used to analyze risk of pests in different management of spring wheat fields. Results showed that, Sitobion avenae (Fabricius), Schizaphis graminum and Rhopalosiphum padi (Linnaeus) were the frequent disaster pests. Pentfaleus major (Duges), Sitodiplosis mosellana (G6hin) and Mythimna separate (Walker) were the incidental disaster pests. Optimal 3 separations were most fitting to divide wheat pest sub communities. The whole stages were the infancy period (before May 15th), the exponential period (from May 15th to June 10th), and the recession period (after June 10th). Dynamics of populations of the frequent disaster pests showed that the exponential period was the key periods to control pests. Dynamics of populations showed that the frequent disaster pests only had one exponential growth stage in one year. The optimal controlling stage was from late part of the infancy period to early part of exponential period which was the key periods to control pests.
Key words: agricultural entomology and pest control; risk assessment; wheat field; disaster pests; optimal separations; control strategies
发表期数: 2011年10月第19期
引用格式: 卢纯,关晓庆,王颖,等. 银川平原小麦主要害虫的风险性评估与种群动态[J]. 中国科技论文在线精品论文,2011,4(19):1767-1774.
 
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