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 12COPYRIGHT: (C)2016,JPO&INPIT【課題】害虫に対する天敵群集,競争者群集の影響を客観的に評価した評価方法を提供する。【解決手段】評価対象である農作物に存在する害虫および,害虫と相互作用する生物群集の数を,数日から数カ月の間隔をおいて複数回カウントされたデータに基づいて害虫の増殖を評価する。次に,複数回カウントされた期間の環境要因に関する環境データを決定し,複数回カウントされたデータから得られた害虫および,害虫と相互作用する生物群集の数と,決定した環境データから重回帰分析を行う。さらに,AICを変数選択基準とするステップワイズ分析により,真に害虫の増殖率に効果のあった要因を決定する。【選択図】図12
