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2005年在扬州市邗江区1块50 m×105 m的稻田做网格取样调查,利用地统计方法对灰飞虱成、若虫的时空动态进行了初步分析。在14次调查低龄若虫、高龄若虫和长翅成虫拟合得到的变差函数模型中,符合球状模型、指数模型和高斯模型的分别有20、13和9个。大多数数据各向异性显著,且方向与水稻行方向密切相关。与若虫相比,成虫的各向异性表现出很强的随机性;大部分数据的空间自相关性中等或较弱,其中低龄若虫的空间结构受成虫产卵行为影响而表现无规律,高龄若虫的随机性强度与密度成负对数曲线相关,长翅型成虫则随机性一直很强。对其时间序列上的克立金插值图分析得出,施药对飞虱田间分布的影响显著。若虫的分布情况相对稳定,长翅型成虫则在高峰期有扩散的现象。成、若虫在空间结构和田间分布上的特点主要是由其自身行动能力所决定,而成虫产卵和施药等也是其影响因素。
In 2005, a sample survey was conducted in a 50 m × 105 m paddy field in Hanjiang District, Yangzhou City. The temporal and spatial dynamics of Laodelphax striatellus and Nymphs were analyzed by geostatistics. In the variogram model fitted by 14 surveys of young nymphs, elder nymphs and adult moths, 20, 13 and 9 were fitted to the spherical, exponential and Gaussian models, respectively. Most data anisotropy significant, and the direction is closely related with the direction of rice. Compared with the nymphs, adult anisotropy showed a strong randomness; most of the spatial autocorrelation of data was moderate or weak, in which the spatial structure of young nymphs was irregularly affected by the spawning behavior of adult worms. The randomness strength and density are negative logarithmic curves, whereas the long-winged adults have a strong randomness. Analysis of the time-series Kriging interpolation figure shows that the application of pesticides has a significant effect on the distribution of planthoppers. The distribution of nymphs is relatively stable, the long-winged adults have the phenomenon of proliferation in the peak. Into the nymphs in the spatial structure and field distribution characteristics are mainly determined by their own ability to act, and adult eggs and spraying are also the influencing factors.