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Sinopsis de BIOLOGICAL CONTROL OF THE CITRUS BLACKFLY ALEUROCANTHUS WOGLUMI ASHBY BY PROSPALTELLA OPULENTA SILV IN CENTRALWESTERN VENEZUELA
AbstractThe citrus blackfly Aleurocanthus woglumi Ashby is assumed to be a native of India India and Pakistan South Asia Southern China and Asia Specimens were first received by USDA Entomology in 1910 from MaxwellLefroy in India The first report of A woglumi in the Western Hemisphere was made by Ashby in Jamaica in 1915 From here the citrus blackfly invaded other countries and now is widely distributed in the Western HemisphereThe introduction of the natural enemies from Asia to the Western Hemisphere can be divided into 2 stages The first stage began in 1930 with shipment of Eretmocerus serius from Malaya to Cuba where it was successfully established and controlled the citrus blackfly This parasite was later introduced into other countries of the Hemisphere The second stage began in 1949 with the shipment of parasitized material from India and Pakistand to Mexico Of the species of parasites received in Mexico Amitus hesperidum Prospaltella opulenta and P clypealis proved to be the most effective in the control of the pest and were later introduced into other countries of the HemisphereAfter being found and eradicated by means of chemical applications from Florida 1937 and Texas 1955 the citrus blackfly reinvaded Texas in 1967 and Florida in 1976 It proved unfeasible if not impossible to eradicate these infestations and both are now effectivelly controlled by parasites Parasites have provided highly satisfactory control in all infested countries where they have been introduced When earlier control seemed to break down Jamaica the situation was corrected by introduction of a second species of parasite In Mexico where adverse climatic or cultural factors cause sporadic local outbrakes control is reestablished by reintroducing parasite from localities where they are abundantIn Venezuela A woglumi was first found in 1967 at San Antonio del Tachira and was first observed in Barquisimeto in 1968 By 1974 the citrus blackfly was widespread through all the country The firs
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