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larva |
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larva![]() A tropical moth larva in a Costa Rican rainforest. The larva is shown eating; this stage is the main nutritive stage of a moth's or a butterfly's life cycle. The larva will metamorphose into a pupa; during the pupal stage, the insect will rest for days, weeks, or even months, before emerging as an adult moth. Stage between hatching and adulthood in those species in which the young have a different appearance and way of life from the adults. Examples include tadpoles (frogs) and caterpillars (butterflies and moths). Larvae are typical of the invertebrates, some of which (for example, shrimps) have two or more distinct larval stages. Among vertebrates, it is only the amphibians and some fishes that have a larval stage. The process whereby the larva changes into another stage, such as a pupa (chrysalis) or adult, is known as metamorphosis. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Source reduction, application of larvicides, and targeted spraying of pesticides to kill adult mosquitoes can reduce the abundance of mosquitoes, but demonstrating their impact on the incidence of human WNV disease is challenging because of the difficulty in accounting for all determinants of mosquito abundance and human exposure. MESSAGE: Encourage concerned citizens to call local government officials and/or mosquito abatement districts and ask that they use larvicides to prevent mosquitoes. Hazelrigg said intensified efforts to spray larvicides into sewers, storm drains and flood-control channels to kill mosquito larvae have been successful. |
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