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- W4313909940 abstract "Abstract Host plants used by phytophagous insects can have significant consequences on demography parameters, overall lifetime fitness and their subsequent population dynamics. Here, we conduct a comparative demographic study between the specialist Zeugodacus cucumis (French) and generalist Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) to determine whether the host plants used by these fly species play any role in their overall lifetime fitness and explains current host use patterns. These two fly species are pests within the north‐eastern region of Australia and we further aimed to use complete life‐history data to determine the population parameters and models that would help identify the sensitive life‐history stage that could be targeted for effective field management. Eggs collected from laboratory‐reared flies were inoculated into organically grown fruits of both the primary and alternate host plant cultivars of both fly species. The proportion surviving each life stage from egg through to adult and fecundity were monitored for all cohorts from the different plant cultivars. Complete stage‐base life‐tables for cohorts of each fly species developing from each fruit cultivar were constructed, and the key demographic parameters and population models were analysed using PopTools matrix model programme. Our results showed that the host used by each fly species had significant consequences on fly demographic parameters and hence their overall lifetime fitness. The generalist B. tryoni was able to compensate for the fitness loss experienced at the pre‐adult stage by having adults with higher fecundity, but this was not the case for the specialist Z. cucumis . Stage‐base population models revealed that the population growth rate of both species was highly sensitive at the adult reproductive stage, indicating that manipulating probability of survival at this life stage would effectively manage populations of these pest species. This study provides the empirical evidence of undertaking complete life history demography studies of phytophagous insects to accurately understand their lifetime fitness consequences of using a certain host, their observed host use patterns, and overall population dynamics. We suggest that any efforts to manage dacine fruit fly pest population should consider life‐history consequences of host use." @default.
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- W4313909940 date "2023-02-05" @default.
- W4313909940 modified "2023-09-26" @default.
- W4313909940 title "Comparative demography of a specialist and generalist fruit fly: Implications for host use and pest management" @default.
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- W4313909940 doi "https://doi.org/10.1111/aab.12818" @default.
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