Spatial distribution pattern and population dynamics of Hemiberlesia pitysophila and Encarsia amicula
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Key Words：Hemiberlesia pitysophila， Encarsia amicula， spatial distribution pattern， population dynamics
Abstract： The spatial distribution pattern and population dynamics of Hemiberlesia pitysophila Takagi and its native parasitoid Encarsia amicula Viggiani et Ren were studied in the experimental forest in Gangdong Province. The results showed that the spatial distribution pattern of them both belonged to uniform distribution. The population dynamics modeling of H. pitysophila and E. amicula were described with “S” curve.There was one peak of the seasonal population density of H. pitysophila, which occurred from late March to late April. There were two peaks of the seasonal population density of E. amicula, which occurred in late February and from late April to mid May respectively.In addition, there were two peaks of the parasitism rates of E. amicula, which occurred in late February and from late April to early June respectively. All results indicated that there was high consistency of the spatial distribution pattern and population dynamics between H. pitysophila and E. amicula.