Globodera infestation was evaluated in soils of private farm plots in Chernihiv and Kyiv regions of Ukraine in 2017–2018. Soil samples were taken at 88 farms, 15.02 ha in total, in 11 settlements of 6 districts. The nematode abundance in the examined areas was graded as follows: less than 1000 eggs + larvae/100 cm3 — low rate of infestation; 1000–5000 eggs + larvae/100 cm3 — average rate; more than 5000 eggs + larvae/100 cm3 — high rate. 85.4 % of study area is infested with the golden potato cyst nematode. The mean abundance of pest was 3331 (15–23,237) eggs+larvae/100 cm3: including 8730 (91–21,486) eggs+larvae/100 cm3 in Kyiv Region and 1829.6 (15–23,237) eggs+larvae/100 cm3 in Chernihiv Region. The highest number of assessed plots per district (29) was in Koryukivsky District, and the mean abundance of G. rostochiensis (Rо-1) was 1549 (20–15,757) eggs + larvae/100 cm3e+l/100cm3. We also analyzed the results of golden nematode monitoring conducted by the State Service of Ukraine for food safety and consumer protection in 2018. According to those, the golden nematode is found in 18 regions of Ukraine. In most of those (14 regions), the pest infests rather small areas, less than 500 ha. Globodera is not recorded in the other 7 regions of Ukraine and Autonomous Republic of Crimea for now.

A survey of 11 domestic potato varieties in 2017 and 2018 in the spring after storage showed that the infection of the tubers of Ditylenhus destructor Thorne, 1945 did not exceed 0.5—7% in them. This allowed us to classify the studied varieties as a relatively stable group. The loss of harvest during storage in 2017 was from 1.0 to 6.4%; in 2018 from 0 to 3.3%. The accounts tubers affected by the D. destructor in 7 blighty potato varieties during the harvest period (October 2016) and after storage (March 2017) allowed to determine the level of development of the disease and to classify Chervona Ruta, Yavor, Tiras to relatively stable varieties, Slavyanka and Teterev — to medium — and two varieties Serpanok and Svitanok kievskii — in the receptive.

Qualitative structure sugar-beet nematode populations Нeterodera schachtii Schmidt provided the cultivation of spring rape. It is established that such factors as gap-fillingness cysts, the number of viable, vain and affected micromycetes cysts depend on temperature factors, host plant, the action of chemical and biological agents and characterize the viability nematode populations in agrocenoses investigated.