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为研究寄主植物对桃小食心虫越冬幼虫体内耐寒性物质的影响,测定了苹果、酸枣、枣、梨和山楂5种寄主植物上采集的桃小食心虫越冬幼虫过冷却点、体内含水量、总脂肪、总蛋白和总糖含量.结果表明:5种果实上采集到的桃小食心虫越冬幼虫的过冷却点(SCP)和结冰点(FP)存在显著差异,均值分别在-15.53~-8.50℃和-11.31~-4.04℃.其中取食山楂的幼虫SCP、FP和糖原含量最高,含水量最低;取食苹果的SCP、FP、糖原和总脂肪含量最低,含水量和总蛋白含量最高;取食梨的桃小食心虫越冬幼虫的鲜质量最高;取食枣的桃小食心虫的总脂肪含量最高,总蛋白含量和鲜质量最低.
In order to study the effect of host plants on cold-resistant substances in overwintering larvae of Peach Moth, we measured the subcooling points, body water content, total fat (Ps) of overwintering larvae collected from five host plants of apple, jujube, date, pear and hawthorn , Total protein and total sugar content.The results showed that there were significant differences in supercooling point (SCP) and freezing point (FP) of overwintering larvae collected from five fruits, with average values of -15.53 ~ -8.50 ℃ And -11.31 ~ -4.04 ℃, respectively.Among the larvae fed on hawthorn, the contents of SCP, FP and glycogen were the highest and the water content was the lowest.The contents of SCP, FP, glycogen and total fat were the lowest, while the content of water and total protein were the highest ; Pear moths feeding on pears overwintering larva fresh fresh highest quality; jujube peach moth worms highest total fat content, total protein content and fresh quality lowest.