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A Simulation Model for Predicting the Efficiency of Biological Control of Spider Mites by Phytoseiid Predators. 1. The Model. Yutaka SAITO, Satoru URAWO (Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University, Kita-ku, Sapporo, Hokkaido 060, Japan), Hiroshi NAKAO (Hokkaido Kamikawa Agricultural Experiment Station, Pippu, Hokkaido 078-03, Japan), Kunihiro AMIMOTO (Shikoku Research Institute Inc., Yashima, Kagawa 761-01, Japan) and Hans MORI (Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University, Kita-ku, Sapporo, Hokkaido 060, Japan). Jpn. J. Appl. Entomol. Zool. 40: 103-111 (1996) 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.

nihon ouyou doubutsu konchuu gakkaishi/nihon ōyō dōbutsu konchū gakkaishi

A Simulation Model for Predicting the Efficiency of Biological Control of Spider Mites by Phytoseiid Predators. 2. Validity Tests and Data Necessary for Practical Usage.