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通过田间系统调查与雌虫卵巢系统解剖研究了2008—2010年潜山混作稻区白背飞虱Sogatella furcifera (Horváth)的种群动态以及各发生世代的虫源性质,并结合2005年以来的灯诱及田间普查资料分析了造成不同年份白背飞虱种群消长态势差异性的主要原因。结果表明:(1)第3、4代白背飞虱分别在8月初和9月上中旬有2个发生高峰期,其中第3代主害单季中稻,第4代主害双季晚稻。(2)单季中稻和双季晚稻田白背飞虱各发生世代的虫源性质有所不同,中稻田四(2)代后期、五(3)代前期属于本地滞留、部分迁出,五(3)代后期属于大部迁出、少量滞留为害;而晚稻田五(3)代后期为基本迁入型,六(4)代前期为本地繁殖、少量迁出型,六(4)代后期大部迁出。(3)前期迁入虫量会影响田间2、3代种群数量,中稻田第3代滞留虫量的多少是影响双晚田后期发生量的重要因素,而降雨、温度等气象因子则是影响主害代(第3代)种群迁出与滞留的关键因子。
The population dynamics of Sogatella furcifera (Horváth) of white-backed planthopper, Sogatella furcifera (Homoptera: Sogatella furcifera) in mixed hill areas of 2008-2010 and its origin in each generation were studied through field investigation and anatomy of female ovary system. And field census data to analyze the main causes of the divergence and growth of whitebacked planthopper in different years. The results showed that: (1) The third and fourth generation whitebacked planthoppers had two peak occurrences at the beginning of August and the middle of September respectively, of which the third generation had the main single season middle-season rice and the fourth generation had the double-season late rice. (2) The origin of white-backed planthoppers in single-season and double-season late-rice paddies were different from each other. The middle-paddy fields were locally retained and partly moved out during the later period of the fourth (2) (3) Most of the late migrants belonged to the majority of them, while the late rice (5) generations were the basic immigrant type in the late stage of the paddy field. The 6 (4) Most later moved out. (3) The amount of migratory worms in the early stage will affect the population numbers of the second and third generation in the field. The amount of third generation stagnant insects in the mid-field rice fields is an important factor that affects the late stage of double cropland, while the meteorological factors such as rainfall and temperature affect The main factor (third generation) population movement and retention of key factors.