The papaya mealybug, Williams and Granara de Willink (Hemiptera: Pseudococcidae), is a polyphagous invasive pest in China. The effect that the shifting of the host plant has on the fitness of a polyphagous pest is critical to its prevalence and potential pest control. In order to assess the fitness changes of . after transferal from potato ( (Tubiflorae: Solanaceae)) to papaya ( (Parietales: Caricacea)), sweet potato ( (Tubiflorae: Convolvulaceae)), and alligator weed ( (Centrospermae: Amaranthaceae)), the life table data of three consecutive generations were collected and analyzed using the age-stage, two-sex life table method. The results showed that when . was transferred from . to papaya, a higher intrinsic rate of increase () and finite rate of increase () were observed. individuals transferred to . had the significantly lower population parameters than those on . ; however, the fitness recovered for those on . after two generations. individuals were unable to complete development on . . Our results conclusively demonstrate that . individuals can readily adapt to . and . even after host plant shifting, and are capable of causing severe damage to these hosts.
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| http://dx.doi.org/10.3390/insects13090804 | DOI Listing |
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