The distribution of the Western Corn Rіootworm (Diabrotica virgifera virgifera Le Conte) in Ternopil region during 2016—2020

Abstract

Goal. To analyze the distribution of the Western Corn Rootworm (Diabrotica virgifera virgifera Le Conte) in the Ternopil region during 2016—2020. Methods. To generalize the results of phytosanitary monitoring of the spread of the regulated harmful organism on the territory of Ukraine and on the territory of Ternopil region according to the data provided by The Department of Phytosanitary Safety of Main Administration of State Service of Ukraine on Food Safety and Consumer Protection (SSUFSCP) in Ternopil region. Results. In 2019 the area of D. virgifera virgifera distribution in Ukraine has increased 1.4 times compared to 2016, and the area of its distribution has expanded. Since D. virgifera virgifera was registered in the Ternopil region, the area of affected has increased by approximately 100 hectares per each year. The average annual temperature apparently contributed to the adaptation and the spread of D. virgifera virgifera throughout the region in 2016—2020, and the winter temperature were suitable for the wintering of the eggs. Conclusions. The western corn rootworm belongs to the quarantine organisms. It needs the use all phytosanitary measures for the containment and restriction of its distribution in the territory of the Ternopil region. According to the average spread of this pest (40—50 km/ year), the further expansion of its population in other regions of Ukraine is predicted. The climatic conditions in the Ternopil region and the available fodder base will promote the development of D. virgifera virgifera.