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cje ›› 1992, Vol. ›› Issue (2): 27-29.

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Determination of Rational Applying Concentration of Insecticides Using Dynamic Modelling Method

Zhang Wenjun, Wang Shize, Liu Shaoyou, Zhang Yongjiang   

  1. Northwest Agricultural University, Yangling, Shanxi Province 712100
  • Received:1989-12-26 Revised:1990-03-16 Online:1992-04-10

Abstract: Improved Weibull's dynamic models are used to simulate the population dynamics of wheat aphids and their natural enemies. Parameters and integrated indices are compared to analyze the effectiveness of different concentrations of rogor oxide in controlling aphids and preserving natural enemies and on wheat yield.The range of rational applying concentrations is determined. The research method has been proven to be simple, practicable and valuable in comprehensive control of insect pests.

Key words: Zhoushan Fishing Ground, fish community, species composition, multi-dimensional scaling (MDS), canonical correspondence analysis (CCA)