不同马铃薯品种对桃蚜发育和繁殖的影响

Effects of different potato cultivars on the development and reproduction of green peach aphid,Myzus per-sicae

为探索不同马铃薯品种对桃蚜生命表参数的影响,为马铃薯品种抗蚜性评价及桃蚜预测预报与综合防治提供依据,在室内观察了桃蚜在“荷兰15号”、“陇薯10号”及“陇薯14号”三个马铃薯品种上的生长发育参数;通过建立特定年龄-阶段两性生命表,分析了不同马铃薯品种对桃蚜生长发育、存活率、繁殖力、寿命期望值(e_(xj))、繁殖值(v_(xj))及种群参数的影响。结果表明:与桃蚜取食“陇薯14号”相比,取食“荷兰15号”后的发育历期较长、寿命较短、繁殖力较低、寿命期望值较短、繁殖值较低;取食“荷兰15号”的蚜虫净增殖率、内禀增长率与周限增长率均低于取食“陇薯10号”和“陇薯14号”,平均世代周期和种群加倍时间则长于取食“陇薯10号”、“陇薯14号”;桃蚜对不同马铃薯品种适应能力不同,“荷兰15号”对桃蚜的抗性显著强于“陇薯10号”和“陇薯14号”。

To explore the effects of potato cultivars on the life table parameters of green peach aphid(Myzus persi-cae),and to provide a basis for the evaluation of aphid-resistance of potato cultivars and the population prediction and integrated management of M.persicae,we examined the growth and development parameters of M.persicae on three potato cultivars(Holland 15,Longshu 10,and Longshu 14)in laboratory.We analyzed the effects of potato cultivars on the growth and development,survival rate,fecundity,life expectancy(e_(xj)),reproductive value(v_(xj)),and population parameters of M.persicae using the age-stage,two-sex life table.The results showed that M.persicae exhibited a longer developmental duration,shorter longevity and life expectancy(e_(xj)),and lower fecundity and re-productive value(v_(xj))when reared on the Holland 15 than on the Longshu 14.Moreover,net reproduction rate(R_(0)),intrinsic rate of increase(r),and finite rate of increase(λ)of M.persicae was lower when reared on the Holland 15 than on the Longshu 10 and Longshu 14,whereas mean generation time(T)and population doubling time(Dt)was longer on the Holland 15 than on the Longshu 10 and Longshu 14.Our results indicate that M.persi-cae has different adaptability to different potato cultivars,and that the resistance of Holland 15 against M.persicae is significantly higher than that of Longshu 10 and Longshu 14.