Monitoring of early Phytophthora infestans infections in potato crops.

摘要

Genetic changes in populations of Phytophthora infestans influence the time of appearance of potato late blight in potato. The late blight monitoring system makes it possible to evaluate the reliability of the forecast provided by decision support systems that are applied in potato protection and, in consequence, in practice it secures potato crops against earlier appearing infections. A local version of the late blight monitoring network on potato fields is the part of a general programme, which was worked out in Denmark for Baltic Sea countries (Denmark, Nordic countries, Estonia, Latvia, Lithuania and Poland), accessible under the address www.web-blight.net. Each country is responsible for organizing local late blight disease survey networks. In Poland, the cooperating institutions were the research institutes (IUNG, IOR-PIB and IHAR) and state organizations (GIORiN and WODR Konskowola). The late blight monitoring network in Poland was based on cooperation of the country administrator (research worker) and country reporters (inspectors of the National Inspectorate of Seed Inspection and Plant Protection) and worked in the years 2001-2006. The results were presented on a map of Poland in Web-blight, accessible under the address www.web-blight.net. Results for particular fields were shown as dots of 3 different colours: green - the field was inspected, but late blight was not found; red - late blight was found; and blue - late blight was found more than 10 days ago. The present situation in monitoring of late blight early infections in potato fields was also shown.