| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaluation method by which influences of communities of natural enemies and of communities of competitors on noxious insects can be objectively evaluated.SOLUTION: Any increase in noxious insects is evaluated on the basis of data counted of the numbers of noxious insects living in the farm product to be evaluated and of biological communities having mutual actions on and by the noxious insects multiple times with intervals of a few days to a few months. Then, environmental data regarding environmental factors during the period in which the numbers were counted multiple times is determined; multiple regression analysis is performed of the numbers of noxious insects and of biological communities having mutual actions on and by the noxious insects multiple times and of the determined environmental data. Further, by stepwise analysis having AIC as the variables selection standard, the factor or factors having truly contributed to the increased rate of the noxious insects is determined.SELECTED DRAWING: Figure 12 |
