A Simulation Model for Predicting the Efficiency of Biological Control of Spider Mites by Phytoseiid Predators. 1. The Model.

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  • SAITO Yutaka
    Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University
  • URANO Satoru
    Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University
  • NAKAO Hiroshi
    Hokkaido Kamikawa Agricultural Experiment Statio
  • AMIMOTO Kunihiro
    Shikoku Research Institute Inc.
  • MORI Hans
    Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University

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Other Title
  • チリカブリダニによるハウス栽培作物のハダニの生物的防除のシミュレーション　１．実用化をサポートするモデル
  • チリカブリダニ ニヨル ハウス サイバイ サクモツ ノ ハダニ ノ セイブツテ
  • 1. The Model
  • 1. 実用化をサポートするモデル

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Abstract

We developed a computer simulation model predicting the efficiency of Phytoseiulus persimilis ATHIASHENRIOT as a biological control agent of Tetranychus urticae KOCH. This model consisted of two main sets of 17 state variables, one for the predator and the other for the prey. The changes of these variables were calculated by difference equations using various rate variables which had appeared in the reports of many authors. Two particular components in the present model were a dispersal (or cannibalism) rate of the predator depending upon female prey density and a coefficient which decreases predation rate depending upon the features of the plant. These were thought to be important to predict actual state of biological control by computer simulation and should be evaluated by experimental and simulation studies in the future.

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