Effect of chemical control on the sanity of forest species seeds

Abstract

O presente trabalho teve como objetivo avaliar o efeito de diferentes tratamentos com fungicidas e hipoclorito de s\uf3dio na redu\ue7\ue3o da incid\ueancia de fungos em sementes de esp\ue9cies florestais nativas da Mata Atl\ue2ntica. O experimento foi conduzido empregando-se o delineamento inteiramente casualizado, no esquema fatorial 5x5, com cinco n\uedveis do fator A (esp\ue9cies florestais) e cinco n\uedveis do fator B (tratamento qu\uedmico e desinfesta\ue7\ue3o superficial com hipoclorito de s\uf3dio), com quatro repeti\ue7\uf5es. Foram identificados os g\ueaneros f\ufangicos Fusarium , Alternaria , Aspergillus e Penicillium . As esp\ue9cies de jacarand\ue1-da-Bahia e ip\uea-roxo apresentaram menor incid\ueancia f\ufangica com 1% e 1,3%, respectivamente. Exceto para a esp\ue9cie de angico-vermelho, o fungicida Pencicurom e o hipoclorito de s\uf3dio n\ue3o deferiram estatisticamente da testemunha nas esp\ue9cies avaliadas. Os tratamentos de sementes com os fungicidas Captan e Tiram proporcionaram resultados satisfat\uf3rios quanto \ue0 redu\ue7\ue3o da incid\ueancia f\ufangica em sementes de esp\ue9cies florestais.This study evaluated the effect of different fungicide and sodium hypochlorite treatments in reducing the incidence of fungi on seeds of native species of the Atlantic rainforest. The experiment was done using the completely randomized design in a 5x5 factorial with five levels of factor A (forest species) and five levels of factor B (chemical treatment and surface disinfection with sodium hypochlorite) with four replications. The fungal genera Fusarium , Alternaria , Aspergillus and Penicillium were identified. The species \u2018Jacarand\ue1-da-Bahia\u2019 and \u2018Ip\uea-roxo\u2019 had lower fungal incidence, 1.0% and 1.3%, respectively. Except for \u2018Angico Vermelho\u2019, the fungicide pencycurom and sodium hypochlorite were not significantly different from the control in the species evaluated. Seed treatment with fungicides \u2018Captan\u2019 and \u2018Tiram\u2019 yielded satisfactory results in reducing the incidence of fungal contamination in forest species seeds