An analysis on ecological factors affecting incidence of rice leafroller, Cnaphalocrocis medinalis, and its use in systematic model of this pest
1988
Shen Xiaocheng | Zhao Baige | Zhang Guifen (Henan Provincial Academy of Agricultural Sciences, Zhengzhou (China). Inst. of Plant Protection)
Studies on relationship between ecological factors and the incidence of rice leafroller, Cnaphalocrocis medinalis were carried out in Henan Province in 1983-1986. The results indicated that the adult population in fields was affected primarily by immigration intensity of adults and plant density; number of eggs affected by adult population and leaf color; and larva number by amount of eggs and natural enemy. A series of equations were established, and they might be used as submodel in a systematic model to forecast the incidence of this pest.
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