Guliak N. The peculiarities of corn protection against the main pests in the conditions of the Northern Forest-Steppe Zone of Ukraine

Objects of researches are the main corn phytophagous insects, their harmfulness and biological features. An aim of researches is to ground and improve the system of corn protection from phytophagous insects at the Northern Forest-Steppe Zone of Ukraine that is based on specifying their species composition (taking to account changes in the climatic conditions of the region) and apply of ecologically safe protective measures. The methods of investigations are: observations, laboratory and field experiments, statistical method. Scientific novelty is: firstly in modern conditions at the Forest-Steppe Zone of Ukraine is specified wireworm bugs species composition and the ratio between instars of their larvae on corn sowings. Stem corn moth biological features, seasonal dynamics and harmfulness are learned. The estimation of the resistance of 23 modern corn hybrids against stem corn moth is conducted. Influence of agrotechnical measures on corn injury by the main pests is investigated. Species composition of the wireworm entomophages and their role in the regulation of wireworm amount are specified. Possibility of the trichogramma usage against stem corn moth is grounded. The efficiency of the modern insecticides against wireworms (seed treatment) and stem corn moth (spraying of culture sowings) is estimated. Branch - agriculture, plant protection.