Spatial Pattern of Erythroneura sudra Population in Peach Orchard
XIN Zhi-mei(Institute of Plant Protection,Shandong Academy of Agricultural Sciences,Jinan,Shandong 250100)
[Objective] The purpose of the study was to control the pest Erythroneura sudra in peach orchard better.[Method] The aggregation index method,Iwao regression analysis and Taylor's power law were applied to study the spatial pattern of E.sudra population in 4 directions of east,south,west and north of peach crown.And the cause of its aggregated distribution was analyzed by aggregation average.[Result] From late May to early Oct,E.sudra showed aggregated distribution in 4 directions of east,south,west and north of peach crown and their aggregation indices were mostly similar.E.sudra individuals attracted each other and the individual group was basic component in its distribution.In middle Jul.and from the end of Jul.to early Aug., the population density of E.sudra was higher with bigger mean-crowding degree.The aggregated distribution of E.sudra in peach crown was induced by environmental condition.[Conclusion] E.sudra showed aggregated distribution in different directions of peach crown.
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| Chinese Journal Full-text Database |
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