Description:
<jats:title>Abstract</jats:title>
<jats:p>The purpose of the research was a comparative evaluation of the disease affection of spring and winter forms of <jats:italic>Brassica napus</jats:italic> and <jats:italic>Brassica juncea</jats:italic> on the central zone of the Krasnodar region. Phytosanitary monitoring of diseases was carried out from the seedling stage. In 2011-2020, there were identified the diseases affecting winter and spring crops <jats:italic>Brassica napus</jats:italic> and <jats:italic>Brassica juncea</jats:italic> to the same extent: the occurrence frequency of downy mildew and powdery mildew was high, of Alternaria blight – from medium to high, of phytoplasma and bacterial blight – low. Differences are established for Sclerotinia disease, Phoma rot, Fusarium blight, white rust, gray rot. The occurrence frequency of Sclerotinia disease on winter form of <jats:italic>Brassica napus</jats:italic> and <jats:italic>Brassica juncea</jats:italic> varied in research years from low to medium, of Phoma rot – from medium to high; on spring forms, these diseases were noted in certain years with the low frequency. Fusarium blight affected only sowings of spring forms of <jats:italic>Brassica napus</jats:italic> and <jats:italic>Brassica juncea</jats:italic> with medium and high frequency, except for 2018-2019, when it was low. White rust affected only spring from of <jats:italic>Brassica napus</jats:italic>, gray rot – only winter forms of <jats:italic>Brassica napus</jats:italic> and <jats:italic>Brassica juncea</jats:italic> in certain years with the low frequency.</jats:p>