Occurrence of adults and biological aspects of Geniates borelli Camerano (Coleoptera, Scarabaeidae, Rutelinae) in Aquidauana, MS, Brazil

Due to the importance of Geniates borelli Camerano as a pest in many crops, studies were developed at Universidade Estadual de Mato Grosso do Sul, Aquidauana campus, MS, Brazil. Adults were collected with a light trap from January 2006 to December 2007. 3,320 adults were collected, and the highest q...

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Veröffentlicht in:Revista brasileira de entomologia 2012-07, Vol.56 (3), p.315-318
Hauptverfasser: Rodrigues, SR, Barbosa, CL, Abot, A R, Ide, S
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Sprache:por
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Zusammenfassung:Due to the importance of Geniates borelli Camerano as a pest in many crops, studies were developed at Universidade Estadual de Mato Grosso do Sul, Aquidauana campus, MS, Brazil. Adults were collected with a light trap from January 2006 to December 2007. 3,320 adults were collected, and the highest quantities were obtained in October 2006 and November 2007, with 1,548 and 802 adults recorded, respectively. Collected adults were kept in plastic containers with soil and Brachiaria decumbens seedlings for oviposition. 535 eggs measuring 2.30 x 1.60 mm were obtained. As the embryonic development progressed, eggs increased in size to 3.00 x 2.70 mm, and this change occurred between 6 and 10 days after oviposition. The embryonic period lasted 17.9 days. The first, second, and third instars lasted 37.6, 49.7, and 74 days, respectively. The prepupal stage lasted 65.9 days and the pupal stage lasted an average of 18.5 days. The biological cycle is completed in 315.8 days, which characterizes the species as univoltine. The average longevity of females was 35.4 days and 28.5 days for males.Original Abstract: Devido a importancia de Geniates borelli Camerano como praga de culturas, foram desenvolvidos estudos na Universidade Estadual de Mato Grosso do Sul, no campus de Aquidauana, MS. Com o uso de armadilha luminosa realizou-se a coleta de adultos de janeiro de 2006 a dezembro de 2007. Foram coletados 3.320 adultos, e as maiores quantidades foram obtidas em outubro de 2006 e novembro de 2007, onde se registraram, respectivamente 1.548 e 802 adultos. Os adultos coletados foram mantidos em recipientes de plastico, contendo solo e mudas de Brachiaria decumbens, para que estes realizassem a oviposicao. Foram obtidos 535 ovos com dimcnsocs de 2,30 x 1,60 mm e com o desenvolvimento embrionario ocorre aumento de tamanho para 3,00 x 2,70 mm e essa mudanca do formato ocorreu entre o 6 degree e 10 degree dia apos a oviposicao. O periodo embrionario durou 17,9 dias, o primeiro, segundo e terceiro instar duraram 37,6, 49,7 e 74 dias, respectivamente. A pre-pupa durou 65,9 dias e a fase de pupa durou a media de 18,5 dias. O ciclo biologico completa-se em 315,8 dias, o que caracteriza a especie como univoltina. A longevidade media das femeas foi de 35,4 dias e dos machos 28,5 dias.
ISSN:0085-5626