辽南苹果园桃小食心虫为害当量函数的拟合与功能分析  

Fitting and Action Analysis of Injurry Equivalent Function of Carposina sasakii in the Apple Orchard in South Liaoning, China

作　　者：王洪平[1] 高萍[1] 王小奇[1] 林文忠 

机构地区：[1]沈阳农业大学植物保护学院,沈阳110161 [2]普兰店农业技术中心,辽宁大连116200

出　　处：《沈阳农业大学学报》2016年第6期711-715,共5页Journal of Shenyang Agricultural University

基　　金：公益性行业(农业)专项经费项目(201103024)

摘　　要：桃小食心虫是北方果树最重要害虫之一,幼虫钻蛀果实并将虫粪排在果实内,造成果树产量和品质损失。由于其生活方式隐蔽,为害损失估计和防治难度大,目前以卵果率为防治指标,不利于果农掌握,生产上需要有简易防治指标,而这简易防治指标需要有理论和试验结果支持。将PEDIGO提出的为害当量理论引入到桃小食心虫为害能力分析,以性诱剂诱捕法监测苹果园桃小食心虫雄蛾量,以分期果实套袋法设置累积蛾量梯度,在果实采收期调查虫果率,对所得田间试验数据进行格式化和统计分析,用美国微软公司的Excel软件建立雄蛾累积量与果实被害率关系的数学模型,求得所建立数学模型的相关参数,确定了高拟合度的为害当量数学模型:IE=∑[(-0.0473i^6+1.3703i^5-15.484i^4+85.712i^3-239.25i^2+312.17i-140.56)×0.002X_i],并对模型的生物学意义进行评价,研究不同时间段桃小食心虫为害能力变化的规律与原因,研究结果不但可以准确估计桃小食心虫种群数量变化导致的总为害量,还可以支持用累积蛾量做防治指标,不仅简化了苹果园桃小食心虫防治指标的调查作业程序与方法,也为其他害虫预测预报和损失估计提供新的参考。Caposina sasakii is one kind of the most serious pests of orchard trees in north China. The larvae borered and defecated in fruit to reduce the yield and quality. They hide and feed in fruits. It is very difficult to estimate the losses caused by the borers, also to control them. Egg fruit ratio was the control index currently. It was difficult to orchard farmers. An easy control index witch has theoretical base and experimental results was needed. In this paper, the theory of injury equivalent from Pedigo was applied to describe the injury ability of Caposina sasakii. The population number of moths was from sex traps. The grads of accumulated moths number was from bagging certain fruits in a series of duration. Injury Ratio of the borer was from checking fruits in autumn harvest. The data was formatted and analyzed in statistics to calculate the parameter of mathematical model introduced before. The computer soft in the use was the Micro Soft Excel 2003. The mathematical model was established with better fitting parameters. It is as： IE=∑[（-0.0473i6＋1.3703i5-15.484i4＋85.712i3-239.25i2＋312.17i-140.56）x0.002Xi]. The biological description of the model was evaluated. The pattern and reason of injury ability of this pest changed in different durations were deduced. It was considered that the result of this study could be used to estimate the total injury equivalence due to the population dynamics of Caposina sasakii. Also, the control index of accumulated moth number was considered effective in according to the result of this article. So the orchard investigation for control index would become very easy. The information was provided to help forecasting other pests or to estimate the losses caused by them.

关 键 词：桃小食心虫 为害当量 累积蛾量 

分 类 号：S433[农业科学—农业昆虫与害虫防治]