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Preliminary study on spatial distribution pattern of Endoclyta signifer Walker Larva.

作  者:
Cao ShuGe;Pang Zheng-hong;Yang XiuHao;Yongting Yu;Qiu RunQin
单  位:
Yulin Pests Control and Quarantine Station, Guangxi, Yulin 537000, Chin;Yulin Pests Control and Quarantine Station, Guangxi, Yulin 537000, China
关键词:
larva;signifer;larvae;method;walker;resul
摘  要:
[Objective] The paper was to study the spatial distribution of Endoclyta signifer Walker Larva. [Method] The larvae distribution in eucalyptus plantation in Beiliu and Luchuan counties of Guangxi province were investigated. Ten standard plots were set, and the spatial distribution pattern of E. signifer larva was confirmed using six different aggregation indexes and regression model analysis method. [Result] The larvae mainly distributed in the base of trunk lower than 1 m, and its spatial distribution pattern was mainly aggregated distribution, which was caused by the environmental factors. The optimum sampling formula of E. signifer larva under different population densities was n=t2(1.1/m+0.674 4)/D2, and limited sequential sampling decision model was T′0(n), T″0(n)=n±1.332n~(1/2)(m0=1). [Conclusion] The result provided scientific basis for sampling and forecasting of E. signifier.

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