Demyaniuk M. Seasonal dynamics of abundance of beetroot weevil and foundations of measures of sugar beet protection from it under conditions of the Central forest - steppe zone of Ukraine

Objects of the investigation are: beetroot weevil, plants of sugar beet. The aim of the research is to study peculiarities of ecology, ethology and biology of the beetroot weevil, and to find out ecologically substantiated means of control of this pest in the Central Forest - Steppe zone of Ukraine. Used methods are: monitoring, laboratory experiments, field experiments, statistical method. Scientific novelty is that it is first research under modern conditions of the peculiarities of phenology, ecology, ethology and biology of the beetroot weevil. It is studied ecological conformity of its behaviour and season dynamics of quantity. The distribution of beetroot weevil's population in the links of sugar beet- grain crop rotation is specified. It is determined the fecundity of the pest in coordination with sub - lethal doses of insecticides which are most widely used for beet seed treating. It is established effectiveness and toxic duration of different mixtures of protective-stimulating chemicals for seed treating against beetroot weevil. The possibility of quantity control of the pest by new insecticides during spraying plants of sugar beet especially on the late stages of their growth and development is substantiated. It is made the test of modern insecticides of different chemical groups for mordanting of edge trap ditches, which are pulled out around beet fields. The branch is agriculture, beet production, plant protection