| 河南省水稻穗期稻纵卷叶螟的危害损失与防治指标的研究 |
| |
| 引用本文： | 张桂芬,刘芹轩.河南省水稻穗期稻纵卷叶螟的危害损失与防治指标的研究[J].植物保护学报,1985,12(1):1-7. |
| |
| 作者姓名： | 张桂芬 刘芹轩 |
| |
| 作者单位： | 河南省农林科学院植保所，河南省农林科学院植保所 |
| |
| 摘 要： | 1979～1983年在郑州采用田间笼罩接虫和大田调查的方法,进行了穗期稻纵卷叶螟危害损失的研究。试验资料经协方差分析导出:虫量(X)与卷叶率(R)之关系式为:R=0.95+0.082X±0.77;卷叶率(R)与损失率(Y)之关系式为:Y=-13.09+21.69lgR±3.99;虫量(X)与损失率(Y)之关系式为:Y=-30.92+20.63lgX±4.65在经济允许损失水平为2%时,其防治指标为百丛三龄幼虫40～50头,卷叶率为5%,并根据各地经济允许损失水平和所用农药种类的防效不同,建立了计算防治指标的数学模型。
|
STUDIES ON YIELD-LOSS AND ECONOMIC THRESHOLD OF THE RICE LEAFFOLDER CNAPHALOCROCIS MEDINALIS (GN.) AT HEADING STAGE OF RICE IN HENAN PROVINCE |
| |
| Zhang Guifen and Liu Qinxuan.STUDIES ON YIELD-LOSS AND ECONOMIC THRESHOLD OF THE RICE LEAFFOLDER CNAPHALOCROCIS MEDINALIS (GN.) AT HEADING STAGE OF RICE IN HENAN PROVINCE[J].Acta Phytophylacica Sinica,1985,12(1):1-7. |
| |
| Authors: | Zhang Guifen and Liu Qinxuan |
| |
| Institution: | Institute of Plant Protection, Henan Academy of Agricultural Science, Zhengzhou, Henan Province and Institute of Plant Protection, Henan Academy of Agricultural Science, Zhengzhou, Henan Province |
| |
| Abstract: | Rice leaffolder is an important rice pest in Henan province.In ord-er to obtain better information on the economic threshold for the appli-cation of insecticides against leaff older on rice,during the growing sea-son of 1979~1983,the writers evaluated the yield losses due to leaffol-der by artificial infestation in different larval density levels at initial heading stage (about 55-60 day after transplanting) to milky ripeness in field plot tests and caged rice at Zhengzhou.It was found that yield reduction were negatively correlated with larval density. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《植物保护学报》浏览原始摘要信息 |
| 点击此处可从《植物保护学报》下载免费的PDF全文 |
