人工饲料pH值对桃蚜存活、繁殖及抗氧化酶活性的影响
高文兴，陈红印**，张礼生
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DOI：
作者单位：中国农业科学院植物保护研究所生物防治农业部重点开放实验室北京100081
中文关键词：桃蚜, 人工饲料, pH值, SOD, CAT
英文关键词：Myzus persicae, artificial diet, pH value, SOD, CAT
中文摘要：
通过测定在不同pH值饲料上桃蚜Myzus persicae (Sulzer)的存活率、繁殖率及其抗氧化酶活性的变化，评价饲料pH值对桃蚜生态和生理指标的影响，筛选扩繁桃蚜饲料最适pH值。结果显示：不同pH值人工饲料饲喂桃蚜，其存活率3 d后即呈现显著差异，在试验调查时间内，饲料pH值为7.0处理的存活率、单雌产蚜量和内禀增长率均为最高；不同处理桃蚜体内的超氧化物歧化酶（SOD）、过氧化氢酶（CAT）活性与对照处理相比均存在显著性差异，在24 h左右达到最大值，而后有所下降；饲料pH值为7.0和7.2 两处理的酶活性变化幅度较小，在48 h后接近正常水平。试验结果表明，扩繁桃蚜较适合的人工饲料pH值为7.0左右。
英文摘要：The effect of dietary pH on eco-physiological indices of the green peach aphid Myzus persicae (Sulzer) were investigated and the optimal pH value for artificial diets for this insect was determined.Significant differences in survival rates were observed in aphids fed diets of different pH after 3 days.The highest survival rate was recorded in aphids fed a diet with a pH of 7.0 SOD and CAT activity significantly increased in all treatments compared to the control.The antioxidant enzyme activity of aphids fed diets with pH 7.0 and 7.2 changed little, and recovered to near normal levels after 48 h.The most suitable pH for an artificial diet for the green peach aphid is 7.0.