Features of protection of intertilled crops under irrigation conditions

Abstract

Irrigation not only changes the ecological conditions of cultivation, but also modifies the existing phytopathocenoses and entomocomplexes, exerting a comprehensive and multi-vector effect, which requires significant changes in protection technologies, development of new methods of pest control. It is important to select a modern range of chemicals that can be effectively used in chemicalisation. The purpose of the study is to identify promising active substances of pesticides for drip irrigation and to develop schemes for their application. Field experiments to determine the effectiveness of certain groups of pesticides under drip irrigation were conducted in the Dry Steppe of Ukraine. The application of the studied drugs took place on the drip irrigation system. To plan research on the use of pesticides under drip irrigation, schemes have been developed to protect row crops: corn, tomatoes, and soybeans. Selected active substances, which are described by translaminar and acropetal movement on the plant, have a systemic nature of action and are highly effective when used in drip irrigation technologies. It is considered that one of the important disadvantages of application of plant protection products with irrigation water is the limitation of application periods by irrigation regimes. The highest efficiency against the main pathogens was observed with the combined method of pesticide application according to the developed schemes. This method involves the use of pesticides together with irrigation water and additional chemical treatment with conventional methods of fertilisation during the growing season. For its part, this allows for preventive treatments in a short time and adjust the timing of treatments depending on the phytosanitary situation