Dazhi Zhang;Xiaowei Chen;Dekui He;Yuting Fa

School of Agriculture,Ningxia University,Yinchuan 750021,China;School of Agriculture,Ningxia University,Yinchuan 750021,Chin

immixtus;eggs and larvae;distribution pattern;the spatial;patch;aggregation intensit

[Objective] The paper was to study the spatial distribution pattern and spatial correlation of eggs and larvae of Kytorhinus immixtus.[Method] By using geostatistical principles and methods,the number of eggs and larvae of K.immixtus was investigated,and the obtained data were analyzed.[Result]The circular model was the best fitting model for eggs and larvae of K.immixtus,and the spatial distribution pattern was aggregated distribution with a spatial correlation,and their variation ranges were 18.899-62.922 and 13.464-47.455.The distribution pattern of eggs and larvae of K.immixtus was simulated by using ordinary Kriging method,and the result showed that their distributions had obvious aggregated character,the aggregated intensity in the core area of patch was significantly higher than that in the edge.There was anisotropy of aggregation intensity,the aggregation intensity from northeast to southwest direction was significantly higher than that from northwest to southeast direction.[Conclusion] The spatial distribution pattern of eggs and larvae of K.immixtus was aggregated distribution,and the increase of plant distance and fragmentation of patch had a certain control effect on the occurrence of K.immixtus population.