Coffee Science
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3355
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Item Alternative treatments diminish oviposition and viability of Leucoptera coffeella (Lepidoptera: Lyonetiidae) eggs and larvae on coffee plants(Editora UFLA, 2021) Androcioli, Humberto Godoy; Hoshino, Adriano Thibes; Meneghin, Ana Maria; Ventura, Mauricio Ursi; Guide, Bruna Aparecida; Hata, Fernando Teruhiko; Menezes Junior, Ayres de OliveiraThe effects of alternative treatments on the oviposition and viability of Leucoptera coffeella eggs and larvae were evaluated. Under controlled conditions, coffee sprouts cv. IAPAR-59, eight months old, were sprayed with brown propolis extract (1%), pyroligneous extract with pepper and garlic (PEPG) (2%), silicate clay (2%), kaolin (5%), lime sulfur (2%), neem oil (1%) and kaolin + neem oil (5% + 1%), distilled water and no treatment. In a first no-choice bioassay, coffee sprouts were sprayed before oviposition and kept in cages, where adult insects within three days after emergence were released. Adults remained in the cages for 24 hours. Eggs were then counted. 10 eggs per sprout were preserved to verify larval mortality. The number of eggs when treated with propolis extract, neem oil, kaolin + neem oil and PEPG decreased in the evaluations. Treatments with neem oil caused greater larval hindrance. Eggs laid on leaves were also sprayed with the treatments. Egg viability was reduced by treatments containing neem oil and lime sulfur. Neem oil treatments resulted in slim adult emergence; intermediate viability with lime sulfur and slight hindrance with silicate clay. Finally, treatments were also sprayed on leaves, hosting first or third instar larvae. Neem treatment caused high mortality for 1st and 3rd instar larvae, however, this effect was reduced when mixed with kaolin. Nonetheless, these negative effects disappeared when considering the adult survival ratio. Results indicated that propolis extract, PEPG and neem oil treatments are suitable for reducing egg deposition, neem oil considerably diminished larvae survival and adult emergence.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 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.