Data/hora: 22/06/2024 14:08:49

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 23/11/2012
Data da última atualização: | 18/05/2017
Autoria: | RESENDE, R. S.; RODRIGUES, F. A.; COSTA, R. V.; SILVA, D. D.
Afiliação: | RODRIGO VERAS DA COSTA, CNPMS; DAGMA DIONISIA DA SILVA, CNPMS.
Título: | Silicon and fungicide effects on anthracnose in moderately resistant and susceptible sorghum lines.
Ano de publicação: | 2013
Fonte/Imprenta: | Journal of Phytopathology, Berlin, v. 161, n. 1, p. 11-17, Jan. 2013.
DOI: | 10.1111/jph.12020
Idioma: | Inglês
Conteúdo: | This study aimed to evaluate the effect of silicon (Si) and its interaction with fungicide on the management of sorghum anthracnose. The experiments were carried out in Si-deficient soil in the 2008/2009 and 2009/2010 growing seasons in a randomized, complete block, split-split plot design with four replications. Calcium silicate (CS) and lime (L), at the rates of 6 and 5 ton/ha, respectively, were randomly assigned to the main plot. Two sorghum lines, BR-008 (resistant) and BR-009 (susceptible), were assigned to the split plots. The split-split plots corresponded to with or without the fungicide Opera® (epoxiconazole+pyraclostrob-in). The residual effect of CS and L from the 2008/2009 growing season was evaluated in the 2009/2010 growing season. For the 2008/2009 growing season, the area under anthracnose progress curve (AUAPC) was reduced by 39 and 42% for lines BR-008 and BR-009, respectively, with the application of CS. In the presence of the fungicide, the AUAPC was reduced by 35 and 42% for the CS and L treatments, respectively. Calcium silicate with and without fungicide contributed to decreasing the AUAPC by 44 and 37%, respectively. The fungicide spray decreased the AUAPC by 50 and 39% for lines BR-008 and BR-009, respectively. Without fungicide, the AUAPC decreased by 88% for line BR-008 compared with line BR-009; however, with fungicide, the reduction reached 90%. The Si leaf tissue concentration significantly increased with the CS application (5.9 g/kg) compared with the L application (0.3 g/kg), regardless of the sorghum line. The yield increased by 0.6 ton/ha with the CS compared to the L application. The fungicide increased yield by 0.48 ton/ha compared with the non-fungicide spray treatment. The residual effect of CS in the soil increased Si leaf tissue concentration and yield as well as reduced the intensity of anthracnose in the 2009/2010 growing season.
Thesagro: | Antracnose; Doença de planta; Sorghum bicolor.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (24945-1) - UPC - AP - DD -  -  -  - DIS