杂交早稻不同生育期对叶面损伤的反应：稻纵卷时螟危害的田间模拟试验  

Response of Early-season Hybrid Rice to Foliar Loss:A Simulation to Damage by the Rice Leaffolder,Cnaphalocrocis medinalis(Lepidoptera:Pyralidae)

作　　者：陈忠孝[1] 冯明光[1] 胡国文[1] 潘群威[1] 

机构地区：[1]中国水稻研究所

出　　处：《中国水稻科学》1995年第1期53-56,共4页Chinese Journal of Rice Science

摘　　要：杂交早稻不同生育期对叶面损伤的反应：稻纵卷时螟危害的田间模拟试验陈忠孝，冯明光，胡国文，潘群威（中国水稻研究所，杭州３１０００６）关键词：稻纵卷叶螟；食叶性害虫；防治指标；杂交稻ＲｅｓｐｏｎｓｅｏｆＥａｒｌｙ－ｓｅａｓｏｎＨｙｂｒｉｄＲｉｃｅｔｏＦｏ...A field trial was conducted under natural ecological conditions and regular management to evaluate the effect of the rice leaffolder, Cnaphalocrocis medinalis,damage on the yield of early-season hybrid rice (Shanyou 402) by artificial defoliation.Foliar area of plants were cut off at the rate of 5%～30% at early tillering,peak tillering,elongation,booting,and milky stage,respectively,with each treatment including four 1m2 replications.The average yields from the plots defoliated at peak tillering were significantly higher than that of the control whereas the yields from the plots defoliated at the milky stage were lower than that of the control.Thus,the hybrid plants were apparently tolerable to foliar injury at tillering.This indicates that the current control thresholds recommended for the leaffolder should be reevaluated and that no spray one month after transplanting should be an acceptable practice for the strategy of the leaffolder control.

关 键 词：稻纵卷叶螟 防治 杂交稻 早稻 危害 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治]