Agricultural technology and the development of root rot spring wheat in forest-steppe of Omsk region

There are present the results of developing root rot causative in grain-fallow and fruit-change rotation under various systems of basic cultivation of meadow-chernozem soil in the forest-steppe Omsk Region - tillage and combined (alternation tillage and nonmoldboard cultivation) under crops processiong (first and second spring wheat after fallow, spring wheat after rape) was conducted on dissimilar levels of intensification. Root rot pathogenic organism mainly affects those epicotyls of spring wheat. It was this part cereal pathological process manifested itself to a greater degree that had a decisive impact on the root system and grain mass. Disease had during the growing season beginning with germination. Observations have shown that the effectiveness of tillage technology was largely determined by chemicalization, predecessor. Rational use of chemicals has had a positive effect on the inhibition of development root rot. Fertilizer combined application was decreased plant damage crop of root rot (disease spread for 5-7, the development disease - 17-37%). Plant infection increased from wheat after rape to second wheat after fallow in 1,1-1,8 times and from tillage to the combined treatment to 34-60%. The yield of wheat depended on the predecessor, tillage systems and used of agricultural chemicals. The highest grain yield in the control variant was observed with tillage treatment of soil, ranging from 2,60 t/ha of wheat for fallow to 1,58 t/ha of wheat for a second after fallow. At fertilizer combined application of yield wheat increased 1,8-2,7 times, depending on the predecessor. Siberian spring wheat varieties well adapted to the difficult agroclimatic conditions of region, but in practice their genetic potential was realized only at the level of 30-50%. Accumulation of Bipolaris sorokiniana agents in agrolandscapes of Western Siberia to increasing risk of root rot epiphytoties and yield losses. In consequence of there was the need to explore ways to improve phytosanitary state agrophytocenosis.