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Tehrān, Iran

Owlia P.,Tehran Unit | Owlia P.,Shahed University | Fatemi A.Z.,Tehran Unit | Salimi H.,Tehran Unit | And 4 more authors.
Egyptian Journal of Biological Pest Control | Year: 2013

Fire blight is a dangerous calamity for apple, pear and quince gardens. Bio-control is a good measure to control this calamity. Carrier has an important role in biocontrol for survival of microorganisms. The aim of this study was to evaluate different compounds as carriers for Pseudumunas fluurescens and Erwinia herbicula that are used as bio-control agents in Iran. Different compositions were prepared as carriers including peat, bagasse, bagasse-perlite and bagasse-charcoal. The carriers were sterilized and inoculated with bacteria at final concentration of 108 CFU/g approximately. Inoculated carriers were stored in room temperature at 4°C for 6 months. The viable bacteria and pH were measured in the carriers after inoculation and every 14 days, whether add or measure increments for six months. The carrier was found to be of a good composition that could significantly retain bacteria viable for 6 months. According to these criteria, all the formulae were suitable as carriers at 4°C. Bagasse was the best carrier at room temperature, because the numbers of bacteria were changed from 8.7 x 107 CFU/g after inoculation to 1.5 x 109 CFU/g after 6 months for P. fluurescens and from 2.53 x 108 CFU/g after inoculation to 1.13 x 108 CFU/g after 6 months for E. herbicula. The pH variation was not sensible in bagasse. The findings are suggestive for application of bagasse as a suitable carrier for its being nature friendly, cheap and availability in Iran. © 2013, Egyptian Society for Biological Control of Pests. All rights reserved. Source

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