ASSESSMENT OF THE RESISTANCE OF SOME VARIETIES OF CEREAL CROPS TO POWDERY DEW IN CONNECTION WITH THE PROBLEM OF FOOD SECURITY

<p>This article presents the results of assessing the resistance of promising varieties of wheat and&nbsp;barley to powdery mildew and development of some methodological issues. Differences were revealed&nbsp;in terms of the degree of susceptibility to diseases. The varieties of soft wheat Ganj, Durakhshon and&nbsp;Yusufi in both conditions (irrigation conditions of the A. Jami region and the conditions of Dushanbe)&nbsp;showed high resistance to powdery mildew and their resistance was 100%. The development of the&nbsp;powdery mildew pathogen depends on the onset and passage of the vegetation phase of plants and the&nbsp;ecological conditions of growing. The assessment of the plant's susceptibility to powdery mildew should&nbsp;be carried out using places with a strong natural background or artificially created. An artificial&nbsp;background in the field should be created in an area isolated from grain crops. The main sign of the&nbsp;resistance of wheat and barley to powdery mildew is also the fullness of the straw</p>