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thrips |
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thrips, minute, agile insects of the order Thysanoptera. Thrips have piercing-and-sucking mouthparts and cup-shaped feet from which bladderlike adhesive organs may be extended. Some species are wingless, but many have four narrow, featherlike wings fringed with hairs. Metamorphosis metamorphosis (mĕt'əmôr`fəsĭs) [Gr. ..... Click the link for more information. is gradual, and some thrips frequently reproduce by parthenogenesis parthenogenesis (pär'thənōjĕn`əsĭs) [Gr. ..... Click the link for more information. . A few species prey on mites and small insects; others, e.g., the onion, pear, greenhouse, and grass thrips, feed on the foliage and flowers of plants to which they may transmit virus diseases. Thrips are classified in the phylum Arthropoda Arthropoda (ärthrŏp`ədə) [Gr.,=jointed feet], largest and most diverse animal phylum. ..... Click the link for more information. , class Insecta, order Thysanoptera. thripsAny of some 5,000 species (order Thysanoptera) of tiny winged insects that feed chiefly on plants, inhabiting temperate and tropical areas worldwide. Many species damage cultivated plants, by either sucking the sap or transmitting viral plant diseases. A few species are predators. Thrips reach a maximum length of about half an inch (15 mm). Most have two pairs of long, narrow, hair-fringed wings. 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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Avocado thrips, which apparently came from Central America and were discovered in a Ventura County orchard in the mid-1990s, spread to other parts of California and caused more than $50 million in damage here this year alone, he said. Called haplodiploidy, this arrangement governs sex determination in some 20 percent of animals, including ants, bees, thrips, white flies, ticks, and mites. It's believed that reflecting uv "b" wavelengths makes plants invisible to pests like thrips, aphids, or white fly, so they don't land on the plants and spread mosaic virus. |
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thrips
