Correlation between biological characteristics of Lecanicillium lecanii and the virulence against Gynaikothrips ficorum
[Objective] This study explored the correlation between biological characteristics of Lecanicillium lecanii and the virulence against Gynaikothrips ficorum to provide reference for preliminary screening of high quality and efficient entomogenous fungi against G.ficorum.[Method] The biological characteristics of four L.lecanii strains (V07,V16063,V3450 and Vp28) were observed and the virulence against Gynaikothrips ficorum was determined.Then,the correlation was analyzed by stepwise regression analysis.[Result] There were similarities and differences among biological characteristics of four L.lecanii strains.They all had high sporulation quantity and conidia germination rate.Strain V3450 had the fastest growth rate and the shortest conidia GT50.Strains V07 had the slowest growth rate and the longest conidia GT50.Growth speed and conidia GT50 of strains V16063 and Vp28 were in middle.The death trend of G.ficorum adults increased with the increase of concentration and infection time.The sequence of infection lethal effect was V3450＞V16063＞Vp28＞V07 while the sequence of LT5o was V3450＜V16063＜Vp28＜V07.Stepwise regression analysis showed that growth speed and conidia GT50 significantly affected corrected accumulative mortality and LT50.[Conclusion] Strain growth rate and conidia GT50 could be used as preliminary screening indices for evaluating the virulence of L.lecanii against G.ficorum when strain sporulation quantity and conidia germination rate were high.
NETL
NSTL
万方数据
维普
