Flutuação populacional de Rhynchophorus palmarum (L.) (Coleoptera: Curculionidae) em palmeiras oleíferas no Amazonas

Abstract

RESUMOAs coleobrocas são umas das principais pragas das palmeiras devido aos seus danos diretos e indiretos resultarem na morte de diversas plantas. O levantamento populacional destes insetos é de extrema importância, visto a necessidade de se manejar adequadamente o controle realizado na área. Este estudo teve como objetivo monitorar a flutuação populacional de Rhynchophorus palmarum em plantios comerciais de Elaeis guineensis Jacq. e E. oleífera (HBK) Cortes, no estado do Amazonas. Foram distribuídas armadilhas iscadas com roletes de cana-de-açúcar e feromônio de agregação para captura de insetos no entorno do plantio, na Estação Experimental do Rio Urubu, localizada no município de Rio Preto da Eva -AM e pertencente ao Centro de Pesquisa Agroflorestal da Amazônia -Embrapa (CPAA Population dynamic Rhynchophorus palmarum (L.) (Coleoptera: Curculionidae) on oil palm trees in the Amazonas State ABSTRACTThe borers are one of the main pests of palms due to their direct and indirect damages which may result in plant death. The population survey of this insect is important in order to properly handle its control. This study aimed to monitor the population dynamic of Rhynchophorus palmarum in commercial plantations of Elaeis guineensis Jacq. and E. oleifera (HBK) Cortes, in the Amazonas State. For capturing insects, baited traps containing pieces of sugarcane stalk and aggregation pheromone were distributed around the plantation, in the Experimental Station of Rio Urubu, Rio Preto da Eva, AM, Brazil. The data were evaluated for the annual (2005 to 2009) incidence of insects, monthly incidence and frequency of capture. Comparing the years, it was found that the largest amount of insects collected was in 2005, being observed a reduction in captured insects by 2007, then the amount of captured insects increased in 2008 and 2009. For months within a given year no difference was found on the population dynamic of this insect (P > 0,05). Approximately 40% of the collections exceeded four insects, being observed similar behavior in the capture frequency of years studied.

Perspectives for Synergic Blends of Attractive Sources in South American Palm Weevil Mass Trapping: Waiting for the Red Palm Weevil Brazil Invasion

“…Adults can fly up to 1.6 km per day [ 7 , 8 ], but it is not common to see them flying during the hottest hours of the day. Experience suggests that R. palmarum populations fluctuate in economic palm-intensive cultivation [ 64 , 65 , 66 ].…”

Monitoring and Characterization of the Spatial Distribution of Rhynchophorus Palmarum in Conventional Oil Palm Planting

“…Curculionidae) similar to that of males, presented value of sexual ratio ranging from 0.44 to 0.50 16 . In studie working with population fluctuation of R. palmarum in oil palm in the state of Amazonas verified that the amount of insects did not vary throughout the year of 2013 6 . For the author this may be related to the little variation of temperature and relative humidity of the air, characterized by pluviometric regularity in that region.…”

Estudo de liberação do Rincoforol adsorvido em carvão ativado do endocarpo do coco de dendê

“…Essa doença é causada pelo nematoide Bursaphelenchus cocophilus por causar danos irreparáveis à planta, podendo levá-la a morte (MENDONÇA, 2007). Além de atacar os coqueirais, outros tipos de plantas são ameaçadas, como os dendezeiros (Elaeis guineensis) (TIGLIA et al, 1998;CYSNE et al, 2013;BOARI et al, 2016), plantações de cana-de-açúcar, mamoeiro, abacaxizeiro (NAVARRO et al, 2002), entre outras espécies. Diversos métodos de controle são utilizados no combate à praga, como o método químico (inseticidas), biológico (fungos), cultural (eliminação de plantas contaminadas) e com feromônios, apresentando esse último uma boa resposta ao controle da praga, quando associado com iscas alimentares em armadilhas artesanais distribuídas na área plantada (FONTES; FERREIRA; SIQUEIRA, 2002;FERREIRA et al, 2014).…”