Effects of nitrogen-stressed potato plants on the development and reproduction of Leptinotarsa decemlineata
Leptinotarsa decemlineata,a worldwide quarantine pest,is known to be one of the most serious pests that significantly impact potato production in China.The growth and development and adult reproduction of Colorado potato beetles were investigated by four different amounts of nitrogen(Nck=0 kg/hm2,Nlow=80 kg/hm2,Nmiddle=160 kg/hm2,Nhigh=240 kg/hm2).The results showed that all Colorado potato beetles could complete one generation under different nitrogen application levels.The data trends indicated that the number of larvae,adults,eggs,and population dynamics of the NCK and Nhigh treatments(total nitrogen applied at planting)were higher compared to the Nlow and Nmiddle treatments.There were no significant differences in population parameters such as intrinsic growth rate(r),weekly growth rate(λ),and net proliferation rate(R0).However,NCK,Nlow,Nmiddle,and Nhigh treatments differed significantly in total reproductive rate(GRR)and mean generation time(T),with Nhigh being significantly higher than the others.This paper explores the effects of different nitrogen-stressed levels on the development of Colorado potato beetles and population proliferation.Studying the impact of nitrogen fertilizer application on the growth and development of Colorado potato beetles not only helps in reducing carbon emissions but also aids in the development of sustainable control methods to control pests.
Leptinotarsa decemlineatanitrogen-stresseddevelopmental durationstwo-sex life table
NETL
NSTL
万方数据
