Monitoring of sunflower breeding material to identify the level of resistance to false powdery mildew

Abstract

Increased production of sunflower oilseeds requires the use of yielding, adapted to the conditions of cultivation varieties and hybrids resistant to harmful pathogens of the growing area. A number of reasons contribute to the decline in crop resistance. One of them is the emergence of conditions for the development of not only new diseases, but also more aggressive races of already well-known pathogens. The most effective and environmentally friendly way to control crop diseases is to create sustainable breeding material. In this regard, in the conditions of the East Kazakhstan region studies were conducted to assess the resistance to false powdery mildew of the promising breeding material of sunflower created by the specialists of the East Kazakhstan Agricultural Experimental Station. Quantitative indices of affected plants and the intensity of sporoniferous lesions on seedlings were determined. Characterization of the degree of susceptibility of the tested samples on a 5-point scale was given. The results of the experiments confirmed the possibility of selection at different stages of the breeding work. The selected source material can be used as parental forms in the creation of new sunflower varieties and hybrids.