Evaluation of selected fungicides against mango anthracnose Colletotrichum gloeosporioides Penz.
Elliott S., Patterson A.
Tropical Fruits Newsletter : 9-11
Abstract : Poison agar tests were used to determine the efficacy of nine fungicides against Colletotrichum gloeosporioides [Glomerella cingulata] isolated from mango. The fungicide concentrations ranged from 0 to 0.1% and the diameter of fungal colonies was measured over five days. Benlateâ (benomyl), Bavistinâ (carbendazim), Topsin Mâ (thiophanate-methyl), Championâ (copper hydroxide), TopCopâ (sulfur and tribasic copper sulfate), Dithaneâ (a dithiocarbamate), and Daconilâ (chlorothalonil) were selected and used in five combinations in a field trial at Brompton Farm, St. Catherine [?Jamaica]. No significant difference was observed among treatments for the incidence of anthracnose (spotting and tear staining) at harvest and during storage and ripening. Spotting and tear staining affected 11.2 and 9.2% of fruits harvested, respectively, and a high incidence of stem end rot (34.8%) was also noted, for which the cause was known. These results indicate that none of the treatments resulted in acceptable levels of disease control or provided any improvement over the farmers' regime, which is Daconil alternated with Champion [chloridazon].