EN
First efforts aimed at application of Internet for the threat of potato by P. infestans in Poland were undertaken within the framework of cooperation between Institute of Plant Protection, and Danish Institute of Agriculture Science in 2001–2002. Significant contribution in development of native Internet based system was brought by cooperation between Institute of Plant Protection and German Central Institution for Decision Support Systems and Programmes in Crop Protection (Zentralstelle für Entscheidungshilfen und Programme im Pflanzenschutz, ZEPP) in 2003–2007. This cooperation enabled polish partners to acquaint with Information System for Integrated Crop Protection developed in Germany, and with aspects of extension service work realized with the help of Internet based decision support system. This knowledge enabled Polish partners to develop a native system for protection of potato against P, infestans. The system delivers information about late blight threat for potato, assessed by the model of Ullrich i Schrödter and results of monitoring conducted by Advisory Service on chosen potato plantations.