Resumo

GAVIRIA-HERNANDEZ, Viviana; PATINO-HOYOS, Luis Fernando  e  SALDARRIAGA-CARDONA, Alegría. In vitro evaluation of commercial fungicides for control of Colletotrichum spp., in blackberry. Corpoica cienc. tecnol. agropecu. [online]. 2013, vol.14, n.1, pp.67-75. ISSN 0122-8706.

Efficiency in vitro of five chemical fungicides, three plant extracts and three biocontrol products were evaluated by their inhibition of mycelial growth percentage and inhibition of fungal biomass percentage, for Colletotrichum gloeosporioides strain 52 and Colletotrichum acutatum strain 168. In the group of chemical fungicides, the best results for inhibition of mycelial growth of both pathogens were obtained with Copper Hydroxide and Difenoconazole, showing 100% of inhibition. Regarding biomass inhibition, the products with higher inhibitory effect in C. gloeosporioides were Difenoconazole showing 100% of inhibition, and Benomyl, which inhibition was between 93% and 99%, and in C. acutatum was Difenoconazol with 100% inhibition and Azoxystrobin with an inhibition between 91% and 97%. Regarding the plant extracts group, Citrus sinensis and C. grandis composed extract, showed 100% inhibition of mycelial growth and fungal biomass, it was the most effective for controlling both strains of fungi. In the biocontrol products group, the inhibition of mycelial growth percentage of the based products on Trichoderma lignorum and T. harzianum was between 61% and 65% for C. gloeosporioides, and between 77% and 79% in C. acutatum, considered in the group of biocontrol products as the most efficient in the in vitro control of 52 and 168 strains of Colletotrichum spp.

Palavras-chave : chemical control; plant diseases; plant extracts; Rubus glaucus Benth; Trichoderma spp..

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