作　　者： ; ; ;

机构地区： 华南农业大学资源环境学院

出　　处： 《植物保护学报》 2011年第1期1-8,共8页

摘　　要： 研究了施用化学农药防治害虫的常规管理稻田和充分发挥天敌自然控害作用为主要防治害虫措施的稻田生态系统内稻纵卷叶螟、稻飞虱及其天敌的发生消长动态,以明确不同稻田生态系统对稻区内主要害虫及其天敌的影响。结果显示,生态调控区稻田内稻纵卷叶螟和稻飞虱最大高峰期虫量仅分别为常规管理区的0.51倍和0.63倍;生态调控区稻周植被上稻纵卷叶螟和稻飞虱发生数量几乎为0,而常规管理区最大高峰期虫量分别达到23.61头/10网和82.03头/10网。生态调控措施还可以显著增加天敌数量,生态调控区稻田内最大高峰期天敌数量为常规管理区的3.72倍,其稻周杂草上最大高峰期天敌数量为常规管理区的5倍以上;同时,天敌与稻纵卷叶螟和稻飞虱发生高峰期吻合度远高于常规管理区。说明生态调控措施能充分发挥稻田及周边非稻田生境的保益控害功能。 The dynamics of Cnaphalocrocis medinalis,planthoppers and their natural enemies were investigated in two kind rice paddies,the conventional management and ecological regulating rice paddy,in order to explore the effects of different rice paddy ecosystems on the main pests and their natural enemies.The results showed that the amounts of C.medinalis and planthoppers on peak in ecological regulating rice paddy were only 0.51 and 0.63 times of those in conventional management rice paddy,respectively.The amounts of C.medinalis and planthoppers on the vegetation around ecological regulating rice paddy were almost zero,while those on the vegetation around conventional management rice paddy were high up to 23.61 and 82.03 individuals per ten nets,respectively.Moreover,the ecological regulating practices increased the abundance of natural enemies significantly,and the amount of natural enemies in ecological regulating rice paddy and in its surrounding vegetation were up to 3.72 and 5.00 folds of those in conventional management rice paddy and in its surrounding vegetation,respectively.Meanwhile,the occurrence peaks of natural enemies were more synchronous with the insect pests in ecological regulating rice paddy than in the conventional management rice paddy.It was suggested that ecological regulating practices could be beneficial to the conservation of natural enemies and control of insect pests.

关 键 词： 常规管理 生态调控 稻纵卷叶螟 稻飞虱 天敌

领　　域： [农业科学]