Comportamento de cultivares de cafeeiro (Coffea arabica L.) resistentes à ferrugem (Hemileia vastatrix) na região de Lavras - MG
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Data
2007
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Resumo
A ferrugem é a doença mais importante do cafeeiro, pois atinge, com gravidade, grandes áreas de lavouras, onde causa prejuízos na produtividade e seu controle exige gastos, a cada ano, aumentando os custos de produção de café.Com o objetivo de analisar o desenvolvimento vegetativo de cultivares resistentes à ferrugem na região de Lavras-MG, foi instalado e conduzido um experimento na Universidade Federal de Lavras, em Lavras - MG, com plantio em dezembro de 2006. Foram avaliadas 25 progênies desenvolvidas pelos programas de melhoramento do cafeeiro das principais instituições que pesquisam essa cultura no Brasil. O delineamento experimental utilizado foi o de blocos casualizados, com três repetições e parcelas constituídas por 10 plantas. O espaçamento adotado foi de 3,5 x 0,70 m sendo avaliadas seis plantas centrais. Foram analisadas as características: diâmetro de caule, número de ramos plagiotrópicos, altura de plantas, número de nós dos ramos plagiotrópicos e comprimento do 1º ramo plagiotrópico. Os resultados obtidos permitiram verificar que existe variabilidade entre as diferentes cultivares resistentes à ferrugem e que algumas das cultivares recém lançadas com resistência à ferrugem apresentaram desenvolvimento inicial semelhante às melhores cultivares tradicionais.
The coffee leaf rust is the most important pathology of coffee, with high incidence in large crops areas, where it causes decrease in productivity and its control needs some expense each year, increasing the coffee production cost. This research aimed to analyze the vegetative development of tolerant cultivars to coffee leaf rust in the region of Lavras, MG. For this purpose the experiment was estabilished in Universidade Federal de Lavras - MG; and the cultivation was made in December/2006.There were evaluated 25 progenies developed by coffee breeding programs from the main research institutions of this crop in Brazil. The experiment design used was random blocks, with three replicates and plots composed by tem plants. The spacing used was 3,5 x 0,70 and the six central plants were evaluated. There were analyzed the following characteristics: shoot diameter, number of plagiotropic shoots, plant height, number of plagiotropic node and length of first plagiotropic shoot. The results showed a variability aurong different cultivars resistant to coffee leaf rust and some news cultivars have similar initial development to the traditional cultivars.
The coffee leaf rust is the most important pathology of coffee, with high incidence in large crops areas, where it causes decrease in productivity and its control needs some expense each year, increasing the coffee production cost. This research aimed to analyze the vegetative development of tolerant cultivars to coffee leaf rust in the region of Lavras, MG. For this purpose the experiment was estabilished in Universidade Federal de Lavras - MG; and the cultivation was made in December/2006.There were evaluated 25 progenies developed by coffee breeding programs from the main research institutions of this crop in Brazil. The experiment design used was random blocks, with three replicates and plots composed by tem plants. The spacing used was 3,5 x 0,70 and the six central plants were evaluated. There were analyzed the following characteristics: shoot diameter, number of plagiotropic shoots, plant height, number of plagiotropic node and length of first plagiotropic shoot. The results showed a variability aurong different cultivars resistant to coffee leaf rust and some news cultivars have similar initial development to the traditional cultivars.
Descrição
Trabalho apresentado no Simpósio de Pesquisa dos Cafés do Brasil (5. : 2007 : Águas de Lindóia, SP). Anais. Brasília, D.F. : Embrapa Café, 2007.
Palavras-chave
Café Progênies Melhoramento genético Resistência à ferrugem Hemileia vastatrix, Coffee Progenies Genetic breeding Resistance to leaf rust Hemileia vastatrix
Citação
Pinto, Marcelo F.; Carvalho, Gladyston R.; Paiva, Renato F.; Ferreira, André D.; Mendes, Antônio Nazareno G.; Pereira, Antônio A. Comportamento de cultivares de cafeeiro (Coffea arabica L.) resistentes à ferrugem (Hemileia vastatrix) na região de Lavras - MG. In: Simpósio de Pesquisa dos Cafés do Brasil (5. : Águas de Lindóia, SP : 2007). Anais. Brasília, D.F. : Embrapa - Café, 2007. (1 CD-ROM), 4p.