Chemical and Biological Treatments for Control of Gummy Stem Blight of Greenhouse Cucumbers |
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| Authors: | RS Utkhede CA Koch |
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| Institution: | (1) Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, PO Box 1000, Aggasiz, British Columbia, Canada, V0M 1A0 |
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| Abstract: | Experiments were conducted to determine the effects of chemical and biological treatments on gummy stem blight of cucumber caused by Didymella bryoniae in vitro and under greenhouse conditions. Eleven strains of Bacillus subtilis, strain AGB10 of B. cereus, and strain B8Fr of Enterobacter agglomerans produced antagonistic zone against D. bryoniae in vitro. Of four experiments conducted, the chemical treatments  Nova ,1 kresoxim-methyl, and azoxystrobin controlled the disease in three experiments and the biological treatments E. agglomerans (B8Fr), B. subtilis (AGS-4), and lysozyme in one experiment when applied as sprays on lesions caused by D. bryoniae on cucumber plants under greenhouse conditions. Fruit rot of cucumber was significantly reduced when the fruit was treated with Nova or kresoxim-methyl. These results suggest the potential of azoxystrobin, kresoxim-methyl, E. agglomerans (B8Fr), and B. subtilis (AGS-4) applied post-inoculation to control gummy stem blight on greenhouse cucumbers. |
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| Keywords: | azoxystrobin Bacillus subtilis Didymella bryoniae Enterobacter agglomerans kresoxim-methyl |
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