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Brazil is the second world largest cassava producer and the largest one in South America. The aleyrodids, commonly known as whiteflies, are pests that affect cassava crops and might induce economic losses, due to high infestation levels. The objective of this work was to survey the whitefly species that occur feeding on cassava ( Manihot esculenta Crantz) crops in the State of Rio de Janeiro. Leaf samplings were conducted in five municipalities of the State and the species identification was realised according to morphological characters of the 4th instar nymphs. Among the 16 aleyrodid species described feeding on cassava in the Neotropical region, Aleurothrixus aepim (Goeldi), Bemisia tuberculata Bondar and Trialeurodes manihoti (Bondar) were identified occurring in the State. The species B. tuberculata and T. manihoti  are reported for the first time in the State of Rio de Janeiro, where they were found feeding on cassava crops. Ocorrencias de Moscas-Brancas (Hemiptera: Aleyrodidae) em Lavouras de Mandioca ( Manihot esculenta Crantz) sob Condicoes de Campo no Estado do Rio de Janeiro, Brasil. Resumo. O Brasil e o segundo maior produtor mundial de mandioca e o maior produtor do continente sul americano. Os aleirodideos, insetos comumente conhecidos como moscas-brancas, sao pragas que acometem esta cultura e podem causar prejuizos economicos, em decorrencia de altas infestacoes. O objetivo deste trabalho foi levantar as especies de moscas-brancas que ocorrem na cultura da mandioca ( Manihot esculenta Crantz) no Estado do Rio de Janeiro. Foram realizadas amostragens de folhas em lavouras localizadas em cinco municipios do estado e a identificacao das especies foi feita por caracteres morfologicos das ninfas de 4.o instar. Das 16 especies de aleirodideos descritas na regiao Neotropical em plantas de mandioca, tres foram identificadas ocorrendo no estado, Aleurothrixus aepim (Goeldi), Bemisia tuberculata Bondar e Trialeurodes manihoti (Bondar). E registrada pela primeira vez no estado a presenca das especies B. tuberculata e T. manihoti em lavouras de mandioca.

entomobrasilis

Occurrences of whiteflies (Hemiptera: Aleyrodidae) on cassava (Manihot esculenta Crantz) crops under field conditions in the State of Rio de Janeiro, Brazil.