江淮稻区三化螟灾变规律和防治技术

REGULARITY OF AND KEY CONTROL STRATEGY FOR YELLOW STEM BORER INFESTATION IN THE RICE PRODUCTION AREA BETWEEN YANGTZ AND HUAI RIVERS

分析了江淮稻区三化螟的起伏历史、回升过程及其特点和对粳稻、杂交籼稻生育期的为害特性及其后效应，并从它与水稻的多层次互作协同性和农田生态系结构与功能动态，探讨了三化螟灾变的生态学规律和地方主导因子。根据稻作特点，分析了三化螟发生趋势，提出综合治理对策和关键技术。

In this paper, investigated were that yellow stem borer Scirpophaga incertulas occurrence stages and its profiles in the rice production area between Yangtz and Huai rivers and, with an emphasis, that infesting characteristics and post infestation effect of the insect against diverse growth phases of japonica and hybrid indica rice, respectively, in phytophysiology and ecology. Furthermore, based on interactive coordination of yellow stem borer population and rice plants in paddy ecosystem, the paper indicated ecological regularity and key regional factors of the insect pest occurrence and infestation in rice. Combined with currence and trend of rice varieties and crop cultivation in the area, incidence forecast and integrated control strategy and key techniques for the insect pest are presented.