Study on Occurrence Characteristics of Diaphania perspectalis and Spatial Distribution of Its Larva

HUANG Qiu-xian et al(Hebei Agricultural University,Baoding,Hebei 071000)  

[Objective] The aim was to analyze the occurrence characteristics of Diaphania perspectalis and spatial distribution of its larva and then provide the theoretical basis for its control.[Method] Through investigating the hedge Buxus sinica in Chaoyang Street of Baoding City and recording the population density of D.perspectalis larva,the relationship between the occurrence of the insect and the surrounding environment was studied.According to the population density of 369 investigated samples,the spatial distribution of its larva was determined by the methods of probability distribution patterns compared with X2 test and some aggregation indexes.[Result] The result of 3 kinds of probability distribution patterns compared with X2 test showed that the 3 kinds of probability distribution patterns all had difference,but the difference between the Possion distribution-X2 test value and X20.05 was largest,so D.perspectalis larva did not fit Possion distribution.The difference of the negative binomial distribution was least,so it was more according to negative binomial distribution.The calculation result of each kind of aggregation index showed that D.perspectalis larva presented aggregating distribution.[Conclusion] The spatial distribution of D.perspectalis larva had direct relation with environment and meantime the control suggestions on the larva were put forward.

【Key Words】： Diaphania perspectalis Occurrence Spatial distribution
【Fund】： 河北省林业局资助项目(0505273)
【CateGory Index】： S763.3

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