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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 the occurrence and development of rice leaf roller, rice planthopper and their natural enemies in paddy field ecosystem, which were controlled by conventional chemical pesticides for pest control and the natural control of natural enemies, were studied. The results showed that different paddy fields Influence of Ecosystem on Main Pests and Their Natural Enemies in Rice Area. The results showed that the maximum larvae of rice leaf roller and planthopper in the ecological regulation area were only 0.51 times and 0.63 times of the conventional management area, respectively. In the ecological control area, the numbers of rice leaf roller and rice fly The number of lice was almost 0, while the maximum peak in the conventional management area reached 23.61 heads / 10 nets and 82.03 heads / 10 nets, respectively. Ecological control measures can also significantly increase the number of natural enemies. The number of natural enemies at the maximum peak during the ecological control area is 3.72 times that of the conventional management area. The number of natural enemies at the maximum peak during weedy weeds is more than 5 times that of the conventional management area. At the same time, The natural enemies coincided with the peak occurrence of rice leaf roller and planthopper at the peak, which was much higher than that of the routine management area. It shows that ecological regulation and control measures can give full play to the protection and control functions of non-rice habitats in and around paddy fields.