Anthocyan repellents applicable to Myzus persicae SULZER (Hemiptera : Aphididae)(Pesticide-producing Agricultural Food Processing)(Department of Agricultural Chemistry)

モモアカアブラムシのカラシナ葉面上の色覚に基づく定着性は, 吸収極大を500∿600nmに持つ各種色素(アントシアン類, 食品着色料, 及び染料を含む)の存在により著しく低下し, 500nm以下では, 逆に増加した。定着性は, また, 波長425nmにおける吸光度の最大吸収波長における吸光度に対する比率が低い程低く, 25%以下で最小値を示した。定着性は, さらに, 555nmの吸収極大における吸光度が高い程低く, その関係は, log(定着性)=2-a(OD)であった(但し, aは定数)。定着性を低下させる赤紫色色素は安全な虫害予防用忌避剤として使用できること, 使用した色素中のアントシアン系色素は, 植物にとって, 食植性昆虫に対する抵抗性を示す物質であること, さらに, これらアントシアン類の農薬としての利用は, 農産製造における一目標となり得ることを示した。The color-vision dependent arrestivity of Myzus persicae SULZER on the green leaf of the leaf mustard was extremely decreased by the various pigments, including anthocyans, food colorlants, and dyes, whose absorbance peaks were in a range of 500-600nm and was increased by the pigments whose absorbance peaks were at 500nm or shorter. The lower values in the ratio of absorbance at 425nm to that at the absorbance peak gave lower values in the arrestivity. The minimum arrestivity was observed at the ratio of 25% or lower. The arrestivity decreased with increasing absorbance at the absorption peak of 555nm. The relationship was expressed as log (arrestivity)=2-a(OD), where a was a constant. It was proposed that the red-purple pigments, by lowering the arrestivity, would be used as the safe repellents for preventing insect attacks, anthocyans would function as a resistant factor of plants against attacks by phytophagous insects, and pesticidal usage of the anthocyans would be developed as one of the economical aims of agricultural food processing