Efeito de nutrientes combinados com indutores de resistência na proteção contra a vassoura-de-bruxa no cacaueiro

• Autor(a) principal: Silva, Iris Lettiere do Socorro Santos da
• Data de Publicação: 2008
• Outros Autores: Resende, Mário Lúcio Vilela de, Ribeiro Júnior, Pedro Martins, Costa, João de Cássia do Bomfim, Camilo, Fabrício Rabelo, Baptista, Juliana C., Salgado, Sônia Maria de Lima
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000100009; http://repositorio.ufla.br/jspui/handle/1/6593
• topic: Resistência induzida; ASM; Fosfitos; Silicatos; Manganês; Crinipellis perniciosa; Induced resistance; Phosphites; Silicates; Manganese

Aiming at improving the level of induction of resistance in cocoa, various nutrients, acibenzolar-S-methyl (ASM) and their combination were tested on cocoa seedlings, clone SIC-23, 30 days before inoculation. The commercial products Supa-potássio® (potassium silicate), Hortifós® PK (potassium phosphite) and Broadacre® Mn (manganese sulfate) were sprayed at doses of 2.5, 5.0 mL and 10.0 mL per liter of water, combined or not, with ASM® (0.2 g/L). The experiment was set in a randomized block design, in a factorial scheme, with four replicates of twelve plants each. Disease incidence was assessed 60 days after inoculation. Only ASM promoted significant control of the disease. Nutrients alone had no effect on disease incidence. On the other hand, the protective effect of ASM disappeared when this product was mixed to Supa-potássio at 5 or 10 mL/L.