Construction of Life Table of Picromerus lewisi Population under Feeding Condition of Tenebrio Molitor Pupa and Glucose
Picromerus lewisi is an important predatory insect,but its breeding still remains a challenge to-day.In order to explore the efficient,low-cost and large-scale feeding method of the Picromerus lewisi,this study fed it with Tenebrio molitor pupa and glucose(pupa+GLU),T.molitor pupa and distilled wa-ter(pupa+H2O),constructed a age-stage two-sex life table of P.lewisi,and used Twosex-MSChart software for analysis.The results showed that the survival rate of the P.lewisi fed with pupa+GLU dur-ing the advanced age was significantly higher than that fed with pupa+H2O(P<0.05).The breeding time of adult P.lewisi fed with pupa+GLU was longer and the total fecundity was higher.The life ex-pectancy(38.90)and reproductive value(60.7)of the P.lewisi fed with pupa+GLU were significantly higher than those fed with pupa+H2O(24.21,31.7);The intrinsic rate of increase(r)and net reproduc-tive rate(R0)of the P.lewisi fed with pupa+GLU were 5.46 and 2.76,respectively,which were signifi-cantly higher than those fed with pupa+H2O(P<0.01),and the population doubling time(DT)was 12.72,significantly lower than that with pupa+H2O(P<0.01).There was no significant difference in the finite rate of increase(λ)and the mean generation time(T)between the two feeding methods(P>0.05).The predation time and net predation rate of P.lewisi fed with pupa+GLU were 95-98 days and 7.68 heads,respectively,which were better than those fed with pupa+H2O.In general,compared with pupa+H2O,the population of P.lewisi fed with pupa+GLU was more stable and had stronger predation ability.The results of this study provided an economical and efficient feeding scheme for the artificial breeding of P.lewisi,and layed a foundation for the large-scale production and development of biocontrol potential.
Picromerus lewisiage-stage two-sex life tablepredation abilityTenebrio molitorglucose
NETL
NSTL
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