Abstract:

In order to supply the reference for controlling and precisely predicting the occurance of Geisha distinctissima Walker, spatial distribution of the eggs in tea garden was detected by using the dispersal indices and Iwao regression approaches. In addition, according to the sampling equations, Iwao and Willson sequential sampling were researched. The results showed that the eggs in the tea garden was in aggregative patterns of spatial distribution. Such patterns were resulted mainly from the Geisha distinctissima Walker’s biological characteristics. And the sample number was 64 and 256 by Iwao sequential sampling, but the sample number was only 10 by Willson sequential sampling. The study are helpful to further research and control.