Studies on Host Conversion Regularity of Myzus persicae(Sulzer) in Early Spring

QIU Rui; LI Chengjun; WANG Haitao; CHEN Yuguo; LI Xiaojie; ZHANG Yahua; LIU Dongsheng; LI Shujun

doi:10.15933/j.cnki.1004-3268.2017.03.017

Abstract：In order to verify the early spring host conversion regularity of Myzus persicae in the central tobacco growing area of Henan province,the developmental duration and fecundity of Myzus persicae on tobacco from five kinds of overwintering host plants(rape,Descurainia sophia,Chinese wolfberry,peach and tobacco) were studied.Meanwhile,we got the innate capacity for increase(rm) and other major life table parameters,and compared the propagation rate and the average fecundity of the five different sources of Myzus persicae on tobacco.The results showed that the developmental duration of Myzus persicae on tobacco was peach(14.820 d)>Chinese wolfberry(14.507 d)>tobacco(14.483 d)>rape(14.481 d)>Descurainia sophia(14.220 d).The average reproduction of Myzus persicae on tobacco was peach(108)>Descurainia sophia(62)>Chinese wolfberry(57)>tobacco(34)>rape(32);rm was peach(0.247)>Chinese wolfberry(0.227)>Descurainia sophia(0.221)>rape(0.183)>tobacco(0.169).Analysis of these results showed that under the same conditions,Myzus persicae from peach had fastest population growth rate,highest reproduction and adaptable ability on tobacco.In conclusion,peach,Descurainia sophia and Chinese wolfberry were the main overwintering hosts of Myzus persicae in the central tobacco growing area of Henan province,on which prevention of the aphids around the tobacco field before the mass formation of alatae in the early spring was the key to control the damage of Myzus persicae.