Acibenzolar-s-metil no controle da ferrugem e da cercosporiose do cafeeiro em condições de campo
Data
2013-01
Título da Revista
ISSN da Revista
Título de Volume
Editor
Editora UFLA
Resumo
Objetivou-se, neste trabalho, avaliar o efeito do indutor de resistência acibenzolar-S-metil (ASM), associado ou não com fungicida à base de ciproconazol + azoxystrobin, no controle da ferrugem e cercosporiose do cafeeiro em condições de campo. O ensaio foi realizado em dois anos safra (2007/2008 e 2008/2009), em plantio comercial com a cultivar Mundo Novo. Os tratamentos utilizados foram: ASM (25 g ha -1 ) aplicado mensalmente 5 vezes (dezembro a abril de cada ano safra); fungicida (500 mL ha -1 ) e a mistura fungicida (500 mL ha -1 ) + ASM aplicados 3 vezes (dezembro, fevereiro e abril de cada ano safra); a mistura fungicida (500 mL ha -1 ) aplicado 3 vezes (dezembro, fevereiro e abril de cada ano safra) + ASM aplicado 5 vezes (dezembro a abril de cada ano safra); a mistura fungicida (750 mL ha -1 ) aplicados 2 vezes (dezembro e março de cada ano safra) + ASM aplicado 5 vezes (dezembro a abril de cada ano safra) e testemunha. O controle da ferrugem (84%) proporcionado pelo ASM foi estatisticamente igual ao tratamento com o fungicida (94%) no ano de safra baixa (2008/2009), quando a intensidade das doenças não foi tão elevada quanto no ano de safra alta (2007/2008). No ano de safra alta, o ASM não controlou a cercosporiose, enquanto que no ano de safra baixa esse produto controlou a cercosporiose (77%) de forma inferior ao fungicida (92%) e suas misturas (89 a 94%). Em ano de safra baixa, o ASM pode ser usado no controle da ferrugem e cercosporiose do cafeeiro e apresentou compatibilidade com o fungicida ciproconazol + azoxystrobin.
The objective of this study was to evaluate the effect of inducing resistance acibenzolar-S-methyl (ASM), associated or not with the fungicide azoxystrobin + cyproconazole base, the control of Cercospora leaf rust and coffee under field conditions. The test was conducted in two crop years (2007/2008 and 2008/2009), in commercial plantation with cultivar Mundo Novo. The treatments were: ASM (25 g ha -1 ) applied 5 times monthly (December-April harvest each year); fungicide (500 mL ha -1 ) and fungicide mixture (500 mL ha-1 ) + ASM applied 3 times (December, February and April of each crop year), the fungicide mixture (500 mL ha-1 ) applied 3 times (December, February and April of each crop year) + ASM applied 5 times (December to April of each crop year) , the fungicide mixture (750 mL ha-1 ) applied 2 times (December and March of each crop year) + ASM applied 5 times (December to April of each crop year) and untreated. The rust control (84%) provided by the ASM was statistically similar to the treatment with the fungicide (94%) in low crop year (2008/2009), when the intensity of the disease was not as high as in the year of crop high (2007/2008). In high crop year, ASM not controlled the cercospora, whereas in low crop years controlled the cercosporiose this product (77%) of the fungicide lower form (92%) and their mixtures (89-94%). In low harvest year, the ASM can be used to control Cercospora leaf rust and coffee and compatibility presented with the fungicide azoxystrobin + cyproconazole.
The objective of this study was to evaluate the effect of inducing resistance acibenzolar-S-methyl (ASM), associated or not with the fungicide azoxystrobin + cyproconazole base, the control of Cercospora leaf rust and coffee under field conditions. The test was conducted in two crop years (2007/2008 and 2008/2009), in commercial plantation with cultivar Mundo Novo. The treatments were: ASM (25 g ha -1 ) applied 5 times monthly (December-April harvest each year); fungicide (500 mL ha -1 ) and fungicide mixture (500 mL ha-1 ) + ASM applied 3 times (December, February and April of each crop year), the fungicide mixture (500 mL ha-1 ) applied 3 times (December, February and April of each crop year) + ASM applied 5 times (December to April of each crop year) , the fungicide mixture (750 mL ha-1 ) applied 2 times (December and March of each crop year) + ASM applied 5 times (December to April of each crop year) and untreated. The rust control (84%) provided by the ASM was statistically similar to the treatment with the fungicide (94%) in low crop year (2008/2009), when the intensity of the disease was not as high as in the year of crop high (2007/2008). In high crop year, ASM not controlled the cercospora, whereas in low crop years controlled the cercosporiose this product (77%) of the fungicide lower form (92%) and their mixtures (89-94%). In low harvest year, the ASM can be used to control Cercospora leaf rust and coffee and compatibility presented with the fungicide azoxystrobin + cyproconazole.
Descrição
Palavras-chave
Coffea arabica, Hemileia vastatrix, Cercospora coffeicola, Indução de resistência
Citação
FERNANDES, L. H. M. et al. Acibenzolar-s-metil no controle da ferrugem e da cercosporiose do cafeeiro em condições de campo. Coffee Science, Lavras, v. 8, n. 1, p. 24-32, jan./mar. 2013.