Study On Improved Ferment Technique Of Agricultural Antibiotic 2507 And Its Application Mode

The agricultural antibiotics had the characteristics of high effect and low toxic to plants, human and environment Use the antibiotic to substitute or partially substitute the chemical pesticide to control the plant diseases should be the expanding direction. Although there were many reports about new kinds of antibiotics for controlling plant diseases, few of them could be used in the agricultural production. Because many agricultural academy or institute especially in China only had the capitulation of screening and evaluation antibiotics, but had no capitulation for studying on their ferment technique, purification and identification of antibiotic and the improvement of the species. Another reason was most of the new antibiotics had good effect in vivo but were unstable in the agricultural condition and had not capitulation for industrial production. The last reason was that there were a few of successful agricultural antibiotic basely only used in the rice production because people paid more attention to rice production before. So there are still very few agricultural antibiotics could be used to control the pests of vegetable and fruit Otherwise, most of the successful agricultural antibiotics in China were the copier of the product of other countries. So it is important for us to develop the new agricultural antibiotic product which we could have our own property right to satisfy the need of agricultural production and market of China.The effective isolate 2507 (Streptomyces spp) producing antibiotic controlling oomycetes was first isolated from the soil samples. The ferment technique of isolate 2507 was studied and the following data was obtained (1) The seed and deep fluid ferment medium of the isolate was system studied. (2) The needful carbon and nitrogen source for the isolate 2507 growing and producing was systems analysis. The adaptive carbon source was rice powder and nitrogen source was mealier starch and peanut cake powder. (3) The ferment period of isolate 2507Were 88 hours with inoculation of spore and about 66 with inoculation of mycelium? (4)The adaptive temperature for mycelia growing was 32-33℃ and for production antibiotic was 33-34℃ in the fermentor. (5) The ferment technique of 30L fermentor had...