寄主植物对扶桑绵粉蚧体型及体内能源物质含量的影响

Effects of host plants on body size and energy substances contents of Phenacoccus solenopsis Tinsley

【目的】研究寄主植物对扶桑绵粉蚧雌成虫体型和体内能源物质含量的影响,为扶桑绵粉蚧的寄主适应性和风险分析提供科学参考。【方法】在室内用8种寄主植物连续饲养扶桑绵粉蚧5代后,测量7日龄雌成虫体长、体宽和体重,并测定体内能源物质(脂肪、可溶性蛋白质、可溶性糖)含量,分析上述指标在不同寄主间的差异。【结果】取食不同寄主后,扶桑绵粉蚧雌成虫体型和体内能源物质含量存在显著差异。取食马铃薯后,雌成虫体长达4.80 mm,体宽为3.07 mm,单头体重为7.11 mg,显著高于取食其他寄主的雌成虫。取食棉花(Bt棉和常规棉)后,扶桑绵粉蚧雌成虫体内可溶性蛋白质含量最高(58.77和57.70 mg·g^(-1));取食常规棉后,可溶性糖含量最高(75.02 mg·g^(-1));取食马铃薯后,脂肪含量最高(349.00 mg·g^(-1))。【结论】寄主植物对扶桑绵粉蚧雌成虫体型和体内能源物质含量有显著影响。取食马铃薯后,扶桑绵粉蚧雌成虫体型较大,体内能源物质含量较高,因此应加强马铃薯上扶桑绵粉蚧的种群监测。

【Aim】In order to provide scientific reference for the risk assessment and host adaptation of cotton mealybug,Phenacoccus solenopsis Tinsley,the effects of host plants on body size and energy substances contents of adult females P.solenopsis were studied.【Method】After having reared five generations of P.solenopsis in the lab with eight different host plants,body length,body width,body weight and energy substances contents(lipid,soluble proteins,soluble sugar)of 7-day-old adult females were measured.【Result】After feeding on different host plants,there were significant differences in body size and energy substances contents of adult females P.solenopsis.After feeding on potato,adult female body length was 4.80 mm,adult female body width was 3.07 mm,and adult female body weight was 7.11 mg.These body size parameters were significantly higher than for females fed on the other host plants.After feeding on cotton(Bt cotton and conventional cotton),the soluble protein content in adult females P.solenopsis was the highest(58.77 and 57.70 mg·g^(-1)).After feeding on conventional cotton,the soluble sugar content was the highest(75.02 mg·g^(-1)).After feeding on potato,the lipid content was the highest(349.00 mg·g^(-1)).【Conclusion】Host plant significantly affected the body size and energy substances contents of adult females P.solenopsis.After feeding on potato,adult females P.solenopsis have larger body size and higher body energy substances contents.Therefore,the population monitoring of P.solenopsis on potato should be strengthened.