During 2019–2023, studies on the resistance of soybean plants to soy cyst-forming nematode (Heterodera glycines) were conducted. Several experiments were carried out using the vegetative pots method. When comparing the reaction of All-Russian Research Institute of Soybean breeding cultivars to infection with soybean cyst nematode, it was found that the most resistant cultivars were Sentyabrinka and Evgeniya. When soybean plants of Sentyabrinka cultivar were infected from one to three times during the growing season, it was noted that repeated infection, which occurred in the same way in the fields, provided that the pest was washed away by rainwater from elevations into drainless relief depressions, led to a higher concentration of Heterodera glycines and the greatest yield losses. A study of the reaction of Sentyabrinka cultivar to a once infection in different stages of the growing season showed that infection during sowing was more harmful than during the flowering and pod formation phases. The reaction of Sentyabrinka cultivar to infection with soybean cyst nematode from different populations was also compared. Heterodera glycines cysts from Amur region and Primorsky krai were used. The experiment showed that the harmfulness of the soybean cyst nematode from Primorsky krai was greater. When studying the influence of soil type on the degree of soybean resistance to soybean nematode infection, meadow chernozem-like and brown forest soils of Amur region were used. It was found that when soybeans were sown in less fertile brown forest soil, the impact of the pest was more harmful; the difference in yield when sown in once infected soil and when sown in pest-free meadow chernozem-like soil turned out to be insignificant.

Kuzmin Alexander A., Anisimov Nikolay S.

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