摘要
在青海省湟水流域以随机区组试验法测试并比较了12个春小麦（Triticum astivum）品种，确定了灰翅麦茎蜂（Cephus fumipennis Eversmann）（膜翅目：茎蜂科）对这些品种的影响，并以幼虫危害春小麦品种所造成的穗粒重下降均值、害虫防治成本和小麦市场价格为基础计算了与价格相关联的小麦损失。同时，应用经济危害水平概念估算了幼虫种群的经济危害水平（EIL），以及幼虫和成虫的经济阈值（ET）。研究结果表明：①与价格关联的小麦损失为0．53g／幼虫；②幼虫的EIL均值为18．9头／m^2，等效于小麦受害率3．2％～6．3％；③所得ET均值为夏季成虫1．2头／m^2，秋季幼虫9．2头／m^2。上述结果可用于制定灰翅麦茎蜂综合治理方案。ET可随小麦品种调整，以适应不同的小麦种植区。
A total of 12 varieties of spring wheat （Triticum astivum） was tested in field-plot experiments in the Valley of Huangshui River, Qinghai Province, China, and the impacts of Cephus fumipennis Eversmann （Hymenoptera. Cephidae） on the varieties were determined. The price-related wheat loss was calculated based on the average of kernel weight reductions caused by the insect＇s larvae, the cost of management against the insect, and the market value of wheat grains. The economicinjury level （EIL） concept was applied to evaluate both the mean EIL of the insect in terms of larval population density and the economic threshold （ET）. The results indicated that：（1）the price-related wheat loss averaged 0.53 g/larva; （2）the mean EIL for larvae was 18.9 individuals/m^2 , or equivalent infestation in wheat, 3.2%-6.3%; （3）the mean ET was 1.2 individuals/m^2 for adults in summer, and 9.2 for larvae in autumn. Presented herein results may be useful in working out an IPM program of the insect. The ET may be adjustable for different varieties and applicable in different wheat production regions.
出处
《西北农业学报》
CAS
CSCD
北大核心
2008年第1期65-69,共5页
Acta Agriculturae Boreali-occidentalis Sinica
基金
funds of the key project"Studies of the IPMTechniques of Some Key Disease and Insect Pests on Spring Wheat"
the People’s Government of Qinghai Province
关键词
灰翅麦茎蜂
经济危害水平
经济阈值
穗粒重
小麦损失
Cephus fumipennis
Economic-injury level
Economic threshold
Kernel weight
Wheat loss
