Resistance of Botryodiplodia theobromae to carbendazim and the fungicides screening using stem end rot of mango fruit as a control
HU Mei-jiao
SHI Chao
AN Yong
LI Min
YANG Feng-zhen
GAO Zhao-yin
Abstract：The resistance to carbendazim of 86 isolates of mango stem end rot pathogen Botryodiplodia theobromae Pat. collected from 3 regions in Hainan province was tested in vitro. The toxicity of 23 fungicides to 4 isolates of B. theobromae was tested by mycelium growth rate methods. The toxicity results were analyzed by the EC_(50) value, the EC_(90) value and the cross-resistance to each other. Results showed that 10 fungicides including sporgon, propiconazole, flusilazole, prochloraz, iprodi-one, difenoconazole, tebuconazole, myclobutanil, pyraclostrobin and validamycin A were recommended for choices for controlling mango stem end rot disease. In addition, the fungicides of chlorothalonil and mancozeb could also be chosen. The resistance to thiophanate-methyl, kresoxim-methyl, and diniconazole was appeared in the tested pathogens. In cross-resistance test, the results showed that carbendazim, kresoxim-methyl and diniconazole had cross-resistance each other, while kresoxim-methyl and validamycin A had negative cross-resistance each other. To avoid the resistance of the pathogen to some of the fungicides, such fungicides should be used by turns.
Keywords：MangoBotryodiplodia theobromae PatFungicideResistanceScreening
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 671-677 )