Periódicos
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3352
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Item Coffee leaf miner incidence and its predation by wasp in coffee intercropped with rubber trees(Editora UFLA, 2018-07) Androcioli, Humberto Godoy; Hoshino, Adriano Thibes; Menezes Júnior, Ayres de Oliveira; Morais, Heverly; Bianco, Rodolfo; Caramori, Paulo HenriqueThe coffee leaf miner (CLM) Leucoptera coffeella has a wide distribution and causes significant losses in coffee plantations (Coffea spp.) in Brazil. Its occurrence can be mitigated in intercropped systems, with the rubber tree (Hevea brasiliensis ) adapting well to the consortium, while also providing extra income to the producer. We aimed to determine whether the afforestation influences the microclimate and affects the leaf miner incidence and its predation by wasp in coffee plants intercropped with rubber trees. The study was undertaken in state of Paraná, Brazil, using coffee plants intercropped with rubber trees planted in double rows (alleys) spaced at 13, 16 and 22 m between alleys, and compared to sole cropping coffee plots. From January 2008 to November 2010, the presence of CLM’s lesions including those with signs of wasp predation was monitored in coffee plants intercropped with rubber trees and in the non-consorted coffee. A higher CLM’s incidence was verified in monoculture coffee plots, while coffee plants located under and two meters away from rubber trees had the lowest incidences. CLM’s incidence in intercropping system got higher as it increased distance from the trees. The number of lesions with signs of predation by wasps was positively correlated with the number CLM’s lesions, indicating a density-dependent predator-prey relationship. The coffee plants intercropped with alley rubber trees reduce the CLM’s occurrence and can be a management’s tactic for this economically important pest.Item Effect of pigeon pea intercropping or shading with leucaena plants on the occurrence of the coffee leaf miner and on its predation by wasps in organic coffee plantings(Universidade Federal de Santa Maria, 2018-03) Hoshino, Adriano Thibes; Bortolotto, Orcial Ceolin; Hata, Fernando Teruhiko; Ventura, Maurício Ursi; Menezes Júnior, Ayres de OliveiraThe infestation of coffee leaf miner and its predation by wasps were assessed in commercial organic coffee plantings shaded with leucaena or intercropped with pigeon pea. Plantings in northern Paraná were assessed every two weeks from June 2011 to December 2012. The percent of infested leaves, number of mines per leaf and the percent of predation by wasps (indicated by lacerations) were determined. Fewer coffee leaf miners and fewer mines per leaf were found in pigeon pea intercropped plantings (28.4% and 0.3, respectively) than in shaded plantings with leucaena (48.1% and 0.8, respectively). More predation by wasps was found in the shaded (27.2%) than in the intercropped (13.2%) plantings. Suggestions for new studies are presented along with suggestions for managing the leaf miner in coffee plantings.Item Produtos alternativos no controle da Hemileia vastatrix (Berkeley & Broome) e Cercospora coffeicola (Berkeley & Cooke) em cafeeiros(Editora UFLA, 2012-05) Androcioli, Humberto Godoy; Menezes Júnior, Ayres de Oliveira; Hoshino, Adriano Thibes; Androcioli, Leonardo GodoyO estudo foi realizado em município da região Norte do estado do Paraná em cafeeiros da cultivar Icatu precoce IAC 3282 com oito anos de idade cultivados em espaçamentos de 2,0m x 0,8m, objetivando-se avaliar a influência de produtos alternativos sobre a Cercosporiose e ferrugem do cafeeiro, para uso em lavoura cultivada, em sistema orgânico de produção. O delineamento utilizado foi o de blocos ao acaso, com sete tratamentos, quatro repetições e parcela útil de 30 plantas. Os tratamentos utilizados foram: Testemunha sem controle; Controle químico (thiametoxan+ cyproconazol); Óleo de nim; Argila silicatada; Calda viçosa; Biofertilizante EM-5 e extrato de própolis no primeiro ano e extrato de própolis no segundo ano e, Caulim/caulim+nim no primeiro ano e Caulim+nim no segundo ano. As avaliações de Cercospora coffeicola e Hemileia vastatrix foram realizadas nos períodos de dezembro/2007 a junho/2008, e dez/2008 a maio/2009. Os resultados nos dois períodos demonstram que o controle químico e os produtos alternativos mantêm a área abaixo da curva da progressão da incidência da C. coffeicola e da H. vastatrix inferior ao obtido em cafeeiros, sem controle da doença. Todos os tratamentos apresentaram produção superior à testemunha na segunda colheita, em 2009. O controle das doenças com produtos alternativos apresentam custos bem mais elevados do que o controle químico, principalmente devido à necessidade de maior mão de obra, indicando a necessidade de compensação no preço do produto final, por parte de consumidores para manter o sistema de agricultura orgânico empresarial competitivo.