OCURRENCE OF Revena plaumanni BONDAR, 1943 (Coleoptera: CURCULIONIDAE) IN PINDO PALM FRUIT

Abstract

-The objective of this study was to identify and to report the occurrence of one of the insects that feeds on the seeds of the pindo palm (Butia odorata). The material was collected in the city of Viamão, Rio Grande do Sul state, Brazil. The larvae obtained in mature fruit were developed in a gerboxe containing sterilized wet sand substrate and not under controlled conditions. The larvae found in the endocarps of Pindo palm originated insects Curculionidae identified as Revena plaumanni Bondar, 1943. Comments about it's biology and behavior are based on the observations performed in the laboratory. Index terms: palm, Curculionidae, seeds, Butia odorata. OCORRÊNCIA DE Revena plaumanni BONDAR, 1943 (COLEOPTERA: CURCULIONIDAE) EM FRUTOS DE BUTIAZEIRORESUMO -O objetivo deste trabalho foi identificar e relatar a ocorrência de um dos insetos que se alimentam das sementes do butiazeiro (Butia odorata). O material foi coletado em Viamão, Rio Grande do Sul, Brasil. As larvas obtidas dos frutos maduros foram criadas em caixas plásticas, contendo como substrato areia úmida, e em ambiente não controlado. As larvas encontradas no endocarpo do fruto do butiazeiro deram origem a um inseto Curculionidae identificado como Revena plaumanni Bondar 1943. Comentários sobre sua biologia e seu comportamento são discutidos com base nas observações realizadas em laboratório. Termos para indexação: palmeira, Curculionidae, sementes, Butia odorata.According to Deble (2011) Butia (Becc.), Becc Palm is a genus that grows mainly in the fields of the central regions of South America, especially in Paraguay, northeastern Argentina, midwestern and southeastern Brazil and Uruguay. The genus includes 19 species, 17 native of Brazil. One such species is the palm Butia odorata (Barb. Rod.) Noblick, which has its natural distribution between the southeastern region of Rio Grande do Sul, Brazil, to Rocha, Uruguay . This species produces fruit of a fleshy mesocarp, with a variety of shapes and colors . In the past half century this plant had great economic importance, and its leaf fiber used in the upholstery industry (Tonietto et al., 2009). Currently, Büttow et al., (2010 reported that the most used part of the Pindo palm fruit is consumed in natura or used in the preparation of liquor, jelly, ice cream, among other products.There are few studies about current infesting insects of Pindo palm seeds. The occurrence of two species of beetles that feed on Pindo palm almonds is mentioned by some authors (LINK;Naibo, 1995; MARTIN et al., 2009). During the harvest period, the presence of the larvae of these beetles can be observed, because after consuming the seed, a channel through the lignified endocarp, mesocarp and exocarp is produced , after leaving the endocarp the larva fall to the ground to become pupa. (MARTIN et al., 2009 From this information, this study aimed to identify the curculionídeo beetle that feeds on Pindo palm seeds and to clarify some biological aspects.On February 17, 2012, in the municipality of Viamão (30°02'11,34 "S an...

Contribution about the occurrence of Pachymerus bridwelli (Prevet) (Coleoptera: Chrysomelidae) in diaspores of pindo palm (Butia odorata) (Barb.Rodr.) Noblick & Lorenzi

“…There were three endocarps with two holes, indicating the possibility of more than one larva completing its cycle inside the endocarp in the same season. Four endocarps showed a little perforation besides the one made by the bruchids, possibly made by Revena plaumanny Bondar 1943, an insect often present in Pindo palm fruits (Figure 1) and mentioned for the first time in B. odorata by Tonietto & Schlindwein (2016).…”