Dudchenko T. Peculiarities of biology of major insect pests of rice and improvement of crop protection systems in Ukraine.

The generalizing characteristic of specific structure harmful entomological complex of rice agrobiocenosis is made, dynamics of number and a condition of populations of the major species thoroughly studied depending on action biological and anthropological factors. Harmfulness of separate species phytophagous is investigated and are specified and changed economical thresholds of harmfulness the major pests of rice. In conditions of Ukraine the estimation of resistance of existing varieties of rice and a selection material to the major insect pests carried out. Influence agrotechnical practices on distribution and number of the major pests of rice is investigated. Factors which are determined reduce population of crops of rice phytophagous. The integrated system of protection of crops of culture is advanced, in which the basic methods of regulation of number phytophagous are harmonious association agrotechnical practices, uses of resistant varieties, and application insecticides at number phytophagous are higher than developed thresholds of harmfulness. It is proved, that application of crops of rice in a phase 3-4 sheets at rice by insecticide Karate Zeon, 5 % CS with dosage 0,2 l/ga effectively supervises number Dipteral insect pests on crops to rice and provides reception more than 1,9 t/ga an additional crop. The analysis of risk of application insecticides on AETI shows that use Karate Zeon, 5 % CS with recommended dosage is safe methods and does not lead to negative influence on an environment.