| The possible competition between Neoseiulus cucumeris, an exotic predacious mite, and E.nicholsi, a native species, was studied in laboratory.WhenN.cucumeris was fed on Acarussp.and E.nicholsi on Tetranychus urticae at 25℃, the cycle rate of increase (λ), net productive rate (R0) and population doubling time (t) of N.cucumeris were 1.0988, 12.13, and 7.35 days, respectively, while those of E.nicholsi were 1.0863, 7.94, 9.38 days, respectively.Significant differences were found on the life table parameters between both predacious mites.Average fecundity of them was 36.35 and 29.78 eggs per female, while longevity were 4000 and 3583 days, respectively, both higher in N.cucumeristhan inE.nicholsi.Furthermore, the population doubling time was shorter in N.cucumeris too.The above results showed thatN.cucumeris has higher potential productive ability than E.nicholsi. |
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