The biological features of a strain-producer in microbiopreparation SGRC-1 Pseudomonas fluorescens - an antagonist of downy mildew pathogen on sunflower

To develop a technological regimen for production of microbiopreparation in a form ‘powder' at surface cultivation on liquid nutrient mediums, there were studied biological features of a strain-producer Sgrc-1 Pseudomonas fluorescens - antagonist of downy mildew pathogen on sunflower. The morphological and cultural qualities of the strain-producer were studied on two agar mediums. The optimal conditions for the strain cultivation were determined: temperature - 25-30 C, Ph of medium 8. Glycerin, glucose and sucrose can be used as a source of carbon nutrition. The optimal sources of nitrogen nutrition are determined sodium nitrate and peptone. The optimal complex nutrient medium for cultivation of the perspective strain Sgrc-1 Pseudomonas fluorescens is King's B medium.