Klechkovskiy Y. Biological substantiation of control of density of the locally distributed quarantine pest insects in fruit stands in the south of Ukrain

On the basis of the ecological characteristics of the fall webworm (Hyphantria cunea Drury), the Oriental fruit moth (Grapholitha molesta Busck), the scale coccines - Quadraspidiotus perniciosus Comst. and Pseudococcus Comstocki Kuw., their real distribution and retrospective analysis of the meteorological conditions by the regions of Ukraine there were defined more exactly zones with the diverse number of the pests" generations, intensively of their reproduction and harmfulness. It was defined more exactly the terms emergence, longevity of the definite stages and generations on the whole. There was worked out a system of algorithms of forecasting and equations of regression for computation of density are these phytophages by the indices of meteorological conditions of the past vegetative season. It was studied an effectiveness of new insecticides as for suppression of infection spots so and for protection of the fruit stands from these pests in zones of their steady reproduction. There were worked outthe effective schemes of the preparations application taking into account the dominant species of quarantine and aboriginal phytophages. It gives an opportunity to control safely the pests" density on economic insensitive level. It was suggested (proposed) a number of new technical solutions to control Quadraspidiotus perniciosus Comst. In the fruit nurseries, in particular, disinfection of young plants by wetting way On the whole, the development system of control of density the locally distributed quarantine pest insects of the fruit crops allows to forecast a degree of their threat in the permanent zones of distribution and use up-to-date methods of counting of population density and reveal the new infestation spots, and control the pests" density more effectively too. Suggested schemes of the insecticides" combinations enter harmoniously to zonal integrated protection systems of the fruit crops and provide a high level of profitableness