Coffee Science
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/3355
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Resultados da Pesquisa
Item Reduction of frost damage to coffee trees under agroforestry systems(Universidade Federal de Lavras, 2023-10-03) Santoro, Patricia Helena; Morais, Heverly; Kitzberger, Cintia Sorane GoodFrosts affect coffee production in Brazil, with effects on commodity prices around the world. Agroforestry systems are strategies to reduce the effects of frost on coffee trees. To date, this study has evaluated the largest number of tree species in coffee tree AFSs in Brazil in the same experiment. The objective was to identify tree species that can protect coffee trees against frost damage in agroforestry systems. The study was conducted in Londrina, Paraná, Brazil. Each treatment consisted of coffee trees associated with one of the following tree species: Moringa oleifera, Croton floribundus, Trema micrantha, Gliricidia sepium, Senna macranthera, Heliocarpus popayanensis, and Mimosa scabrella, as well as a control of coffee trees in monoculture. The experimental area was affected by frost that damaged the coffee plants fifteen months after planting. Immediately thereafter, the dendrometric characteristics of the trees were evaluated. After 30 days, the defoliation and mortality of the trees were evaluated. The phytometric characteristics of the coffee trees were evaluated 12 months after the frosts. Six of the seven tree species were evaluated for the first time for their ability to protect coffee trees against frost. Even at an early stage of development, T. micrantha and H. popayanensis provided increased protection of coffee trees, reducing the defoliation and mortality of coffee trees. The main protective factor was the canopy area of these species, which provided a high rate of tree cover. The development of coffee trees after frosts was favoured by the shading of the species, with the exception of M. scabrella. The AFSs with T. micrantha and H. popayanensis constitute an alternative that allows the mitigation of frost damage to coffee plants in regions prone to this climatic stress, reducing defoliation and mortality.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.