%0 Journal Article %T EFFECT OF CRUDE OIL CONTAMINATION ON SPRING RAPE VULNERABILITY BYDOWNY MILDEW IN FOREST GRAY SOIL %A Osipova, R.A. %A Gilyazov, M.. %K gray forest soil, crude oil contamination, spring rape, contamination level, downy mildew, disease abundance and development, yield %J Vestnik of Kazan State Agrarian University %D 2021 %N 16 %P 5 %I Kazan state agrarian University