Effect of Silicon in Control of Leaf Blast of the Rice in Northern Mato Grosso
DOI:
https://doi.org/10.36560/40201344Palavras-chave:
Oryza sativa, alternative control, diseases, Mato GrossoResumo
The application of silicon in rice has shown effectiveness in controlling diseases such as leaf blastl. Therefore this study evaluated the application of foliar silicon in rice under the growthconditions in the state of Mato Grosso, for leaf blast control. The experiment conducted in the field, Socreppa Munhoz farm, municipality of Porto the Gaúchos/MT. The experimental design was randomized, three treatments with ten replications each. The treatments consisted of foliar application of potassium silicate (Sili-k®, with 171 g Si L-1 and 210 g L-1K2O) dose of 3.0 kg ha-1with an application, two applications, and an untreated control. Evaluation of leaf blast was realized in the four upper leaves in the main tillers of the plant on 10 tillers randomly collected in the four central rows of each plot. The severity of leaf blast was determined using a scale of 10 degrees (0; 0.5; 1.0; 2.0; 4.0; 8.0; 16.0; 32.0; 64.0 and 82.0% leaf area affected). Thr ee assessments were made at intervals of 0, 19 and 34 days after application for calculating the area under the disease progress curve (AUDPC). The best results in reducing the AUDPC were with an application of potassium silicate. Flag leaf with two applications resulted in less severity leaf blast.Referências
BUCK, GUILHERME BOSSI. Silicato de potássio via foliar e o controle da brusone do arroz. 2006. 66p. Dissertação (Mestrado em Agronomia/Solos). Universidade Federal de Uberlandia, 2006.
BRESEGHELLO, F.; STONE L.F. Tecnologia para o arroz de terras altas. v.1, p.01-03, 1998.
CAMPBELL, C.L.; MADDEN, L.V. Introduction to Plant Disease Epidemiology. New York. John Wiley & Sons. 1990.
FILIPPI, M.C.; PRABHU, A.S. Doenças do arroz e seu controle. In: BRESEGHELLO, F.; STONE, L.F. Tecnologia para o arroz de terras altas. v.1, p.139-157, 1998.
KORNDÖRFER, G.H.; DATNOFF, L.E. Adubação com silício: uma alternativa no controle de doenças da cana-de-açúcar e do arroz. Informações Agronômicas , n.70, p.1-5, 1995.
MENZIES, J.; BOWEN, P.; EHRET, D.; GLASS, A. D. M. Foliar applications of potassium silicate reduce severity of powdery mildew on cucumber, muskmelon, and zucchini squash. American Society For Horticultural
Science, Alexandria, v.117, n.6, p.902 -905, 1992.
NOTTEGHEM, J. L. Cooperative experiment on horizontal resistance to rice blast. In: INTERNATIONAL RICE RESEARCH INSTITUTE (Los Baños, Philippines). Blast and upland rice: report and recommendations from the
meeting for international collaboration in upland rice improvement. Los Baños, 1981. p. 43-51.
PRABHU, A.S.; GRANCÊS L. A.; FAUSTINA C.; BERNI R. F. Estimativa de danos causados pela brusone na produtividade de arroz de terras altas. Pesquisa agropecuária Brasileira. v.38, n.9, p.1045-1051, 2003.
PRABHU, A.S.; ARAÚJO, L.G.; SILVA, G.B. Doenças e métodos de controle. Embrapa arroz e feijão: sistemas de produção, 2003. Disponível em: http://sistemasdeproducao.cnptia.embrap
a.br/FontesHTML/Arroz/ArrozTerrasAltas/doencas.htm. Acesso em: 09 out. 2008.
RAFI, M. M.; EPSTEIN, E.; FALK, R. H. Silicon deprivation causes physical abnormalities in wheat (Triticum aestivum L.). Journal of plant Physiology, Rockville, v151, p.497-501, 1997.
RODRIGUES, F.A.; DATNOFF, L.E. Silicon and Rice Disease Management. Fitopatologia Brasileira, n.30, p.457-469, 2005.
Downloads
Publicado
Como Citar
Edição
Seção
Licença
A revista se reserva o direito de fazer altera
