论文部分内容阅读
通过水稻田罩笼试验研究了白背飞虱起飞迁出与世代、田间成虫密度的关系以及降水对起飞的影响,采用系统田调查和长翅雌虫卵巢系统解剖分析了各代翅型分化、迁出与水稻生育期的关系以及各世代虫源性质。结果表明:(1)早中稻田白背飞虱起飞迁出以第2、3代为主,后期迁出较少;(2)白背飞虱起飞迁出数量与田间成虫密度有关;(3)降水影响白背飞虱的起飞;(4)白背飞虱各世代以长翅型为主,世代间翅型分化模式不同于褐飞虱,表现为“长—长—长”;(5)白背飞虱起飞与水稻生育期关系不大;(6)白背飞虱虫源性质分为基本迁入型、部分迁入滞留与部分迁出型、基本迁出型。
The relationship between the takeoff and departure of whitebacked planthopper, generation density and field density and the effect of precipitation on the takeoff were studied by means of field cage experiment in paddy field. The results of field investigation and ovary system dissection of the female were used to analyze the differentiation, The relationship between migration and rice growth period and the nature of insect origin in each generation. The results showed that: (1) the white-backed planthopper, Siphonaptera lugens, was mainly migrated in the second and third generation in the early mid-central paddy field and migrated less in the later stage; (2) (4) The white -backed planthoppers were mainly long-winged in all generations, and the pattern of wing-type differentiation was different from that of the brown planthopper in the generation, which showed “long-long-long” There was not much relation between the development of Siberian planthopper and the rice growth stage. (6) The insect species of Sogatella furcifera were divided into basic immigration type, partial immigration and partial migration, and basic migration type.