. Cooperative economic insect report. Insect pests Control United States Periodicals. - 354 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES BLACK VINE THRIPS (Retithrips syriacus (Mayet)) Economic Importance: Although the species is principally a pest of grapevines, it may cause severe loss to leaves and bolls of cotton in southern India, Malawi and Tanzania when conditions are hot and dry. Black vine thrips sucks sap from the leaves and mars the fruit of many plants. As a result, defoliation and shriveling occur. In the Near East where this important thrips is best known as a pest of grapes
. Cooperative economic insect report. Insect pests Control United States Periodicals. - 354 - INSECTS NOT KNOWN TO OCCUR IN THE UNITED STATES BLACK VINE THRIPS (Retithrips syriacus (Mayet)) Economic Importance: Although the species is principally a pest of grapevines, it may cause severe loss to leaves and bolls of cotton in southern India, Malawi and Tanzania when conditions are hot and dry. Black vine thrips sucks sap from the leaves and mars the fruit of many plants. As a result, defoliation and shriveling occur. In the Near East where this important thrips is best known as a pest of grapes, trees and shrubs, serious infestations of castorbeans have been recorded. R. syriacus damage generally hinders the normal development of the host plants. Distribution: Brazil, Egypt, Ghana, India, Israel, Kenya, Lebanon, Libya, Malawi, Somalia, Sudan, Syria, Tanzania, and Uganda. Hosts: The host list of more than 50 species includes grape, cotton, pear, plum, quince, rose, pecan, walnut, persimmon, avocado, castorbean, coffee, myrtle, vegetables and other General Distribution of Retithrips syriacus (Mayet) Life History and Habits: Bionomics in Israel are as follows: Mating occurs shortly after emergence, but reproduction is parthenogenetic . The female lays a maximum of 80 eggs usually in the leaf tissue, but occasionally on the leaf surface. The egg stage lasts 10-30 days. Larvae do not wander about after hatching but feed immediately, usually in groups. As the larva feeds, it carries a droplet of feces on the tip of the abdomen. Often, the collection of feces is larger than the insect. When the material becomes too heavy, the larva deposits the drop on a leaf and a new droplet begins to form. The older the Thysanoptera: Thripidae No. 163 of Series. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the orig
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
