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O pulgao Toxoptera citricida (Kyrkaldy) (Sternorrhyncha) e um potencial transmissor do virus da tristeza citrica sendo considerada uma praga importante para a cultura, foi realizado monitoramento quinzenais no periodo entre outubro de 2002 a outrubro de 2003, com o objetivo de estudar a dinâmica populacional deste afideo, incluindo predadores e a interacao com formigas, em cultivo orgânico de tangerina cv. Ponca, Fazendinha Agroecologica, Seropedica, RJ. A Analise faunistica dos formicideos atendentes e dos predadores, foi atraves dos indices de diversidade de Shanon-Wiener ( H ') e Simpson (D), dominância de Berger-Parker (d) e equitabilidade J ( e ). Os predadores considerados efetivos na reducao populacional do Pulgao preto dos citros (PPC) foram Cycloneda sanguinea (L.), Azya luteipes Mulsant e Pseudodorus clavatus (Fabr.), apesar de terem sido registrados oito predadores atacando colonias do PPC. Verificou-se C. sanguinea com maior pico populacional, seguido de P. clavatus e A luteipes. A diversidade e equitabilidade dos predadores foi considerada alta ( H' = 0,7979; D =0,9638; e = 0,8836). Atendendo o PPC registrou-se Brachymyrmex sp., Camponotus rufipes (Fabricius) Camponotus atriceps (Fabricius), Camponotus crassus (Mayr), Camponotus clypeatus (Mayr); Crematogaster sp., Solenospis sp., Ectatomma brunneum (Fabricius) e Pseudomyrmex termitarius (Fr. Smith). A diversidade de formicideos foi considerada mediana pelo valor H' (0,6585) e alta pelo valor D (0,9012). A equitabilidade tambem foi considerada mediana ( e =0,69). A dinâmica populacional de T. citricida e influenciada pela brotacao foliar seguido da predacao e o atendimento de formigas. Estes dois ultimos fatores sao antagonicos devido a protecao oferecida pelas formigas ao PPC. Populational Dynamic of Brown Citrus Aphid (Sternorrhyncha) in Organic Cropping of Tangerine ( Citrus reticulata Blanco) in Seropedica – RJ Abstract. The aphid Toxoptera citricida (Kyrkaldy) (Sternorrhyncha) is a potential vector of citrus virus tristeza, consider an important pest of the orchard. Was realized bimonthly monitoring between October 2002 and October 2003, with aim of study the populational dynamic this aphid, included predators ant ant-tending, in organic cropping of tangerine cv Ponkan, Fazendinha Agroecologica, Seropedica, RJ. The faunistic analysis of the ant-tending and predators, were realized across Shanon-Wiener ( H ') and Simpson (D) diversity index's, Berger-Parker dominance (d) and equitability J ( e ). The predators considered efficient in the populational reduction of brown citrus aphid (BCA), was Cycloneda sanguinea (L.), Azya luteipes Mulsant and Pseudodorus clavatus (Fabr.), although has been registered eight predators attacking BCA colonies. Verified that C. sangiunea obtained the biggest populational peak, following P. clavatus and A. luteipes . The predators diversity and equitability was considered high ( H' = 0.7979; D =0.9638; e = 0.8836). Tending BCA, was registered Brachymyrmex sp., Camponotus rufipes (Fabricius) Camponotus atriceps (Fabricius), Camponotus crassus (Mayr), Camponotus clypeatus (Mayr); Crematogaster sp., Solenospis sp., Ectatomma brunneum (Fabricius) and Pseudomyrmex termitarius (Fr. Smith). Ant-tending was considered medium to H' value (0.6585) and high to D value (0.9012). The equitability was considered medium too ( e =0.69). T. citricida populational dynamic is influenced to foliar shoot following predation and ant-tending. These two end factors are antagonist due to protection offer to ants at BCA.

Dinâmica Populacional de Pulgão Preto dos Citros (Sternorrhyncha) em Cultivo Orgânico de Tangerina (Citrus reticulata Blanco) em Seropédica-RJ