Solomiichuk M. Biological-ecological peculiarities of Polymyxa betae K. - causative agent of beet's rhysomania and basic foundation the restricted measures in the conditions of Ukrainian Western Forest-steppe

The funguses' P. betae К. propagation and development of sugar beets in Western Ukraininan Forest-Steppe has been investigated. The new method was devolped for the plant material selection on determination rhyzomania and defining of the beet's acleventive roots by fungal P. betae К., adopted to the specific of crops cultivation and the cargo's inspection method at the beet receiving station. For the first time in Ukraine, the fungal hazard P. betae К. at early stages of beet's plant developing, which may cause 28 % of the plant's death was studied. It was investigated the outdoor environment effect on the fungal P. betae К. in the conditions of Western Ukrainian Forest-Steppe. The season characteristics plasmodium's and cistoruses quantity was defined. At first the new method for the artificial infection background for P. betae K. in laboratory conditions was developed The resistance of some breeds and hybrids of sugar and fodder beets for their pathogen colonization was determined. The ininfluence agrotechnical measures and biological protective technology for the fungal P. betae К. development was studied. Experimentally proved for the growing of different agricultural crops effects on the fungal P. betae К. soil accumulation. The nitrogen fertilizers are used in the form of ammonium nitrate. The double soil builder is used in space between rows at the start of beet's vegetation. These operations are allowed to decrease the root hairs infectious by the fungal P. betae К. It also gives the yield increase and sugareness for sugar beets and then getting the sugar.