Octodonta nipae(Maulik)is an important invasive pest in China.Generally the invasive pests will have the infection risk by new pathogens which could influence the life-history traits of the invader,including their reproduction in the new region.To detect the influence of pathogen infection on reproductive characteristics including mating behavior,fecundity and egg viability,LPS(lipopolysaccharide)was injected into male and female adults to model the pathogen infection,and then let them mate with untreated adults.First mating of LPS-injected male and female groups was significantly delayed,significantly more in males than females.The same was detected in mounting time as well.In both the LPS-injected females and males,the copulation duration was shortened markedly.The fecundity was significantly reduced in females coupled with LPS-induced males but no difference was observed in LPS-injected females.LPS-injected females produced two kinds of eggs which were identified as ootheca-containing eggs(82%±3%)and ootheca-free-eggs(12%±3%).However,immunologically unchallenged females only laid ootheca-containing eggs.Ootheca-containing eggs had higher hatching rates(86%±4%),than did ootheca-freeeggs(19%±5%).No significant differences were found in hatching time(5-8 days)between these two types of eggs.