A rapid development oh plant protection methods in 1940–1950 led to a risk of massive and uncontrolled use of them. In Poland the Institute of Plant Protection – National Research Institute in Poznań established in 1957 is the main research centre for Studies on protection of agricultural crops. Considering the integrated plant protection (IPP), one of the most important elements, it is agrophages’ monitoring to determine optimal timing for performance of chemical treatments in order to reduce their numbers. decision making supportive systems and their development are of a special value for improvement for plant protection programmes. In order to ensure a proper development of agrophages’ forecasting and warning methods the following requirements should be fulfilled: – development of studies on the research bases of agrophages’ forecasting and warning systems, – expantion of the network of meteorological stations, – expantion of the Internet service – „Agrophages Warming System”, „Potato late blight”, – adapting the systems (DSS) developed in other countries to Polish conditions, – expantion of the network of Johnson’s aspirators and volumetric spore traps.
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