Laboratory Biology of an Immigrant Asian Moth, Parapoynx diminutalis (Lepidoptera: Pyralidae), on Hydrilla verticillata (Hydrocharitaceae)
AbstractThe Asian moth Parapoynx diminutalis Snellen is an immigrant in Florida and Panama where it attacks hydrilla, Hydrilla verticillata (L. fil.) Royle, an immigrant submersed weed from Asia. Field populations of P. diminutalis are occasionally heavy on hydrilla but are rarely found on other plant species, including those that are laboratory hosts. Larvae build portable cases from which they feed on leaves and stems. The 7 instars can be differentiated by head capsule widths. Measurements are presented of other immature stages. In the laboratory at 26.7°C, eggs developed in 4-6 d, larvae in 21-35 d, prepupae in 1-2 d, and pupae in 6-7 d. Adults lived 3-5 d at 24.4°C.
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