Mezerniuk T. Polyphagous pests of vine plantations in the south of Ukraine and improvement of protective measures against them

The dissertation substantiates and improves the system of protection of vineyards from a complex of polyphagous pests, taking into account the bioecological features of their development, subject to economic thresholds of harmfulness, its economic assessment is given. The distribution of a complex of polyphagous pests in modern conditions of grape growing and the influence of the degree of their harmfulness on the quantitative and qualitative indicators of the grape harvest was investigated. According to the results of the studies, it was found that on the vine plantations in the south of Ukraine, the number and harmfulness of polyphagous pests, which are widespread, significantly increased. Their species composition has been clarified and the most common and harmful ones have been identified. Their biological developmental characteristics have been studied, phenological calendars have been constructed, and the degree of harmfulness has been established. It was found that polyphagous pests do not show varietal selectivity in relation to grape varieties, and they can inflict the greatest harm not on the entire massif, but only in focal areas and more often near forest belts and agricultural lands with flowering vegetation. The economic threshold of harmfulness was calculated and established for each of the studied polyphagous pest with differentiation in relation to table and industrial grape varieties.