Invasive Species Compendium

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Abstract Full Text

Potato late blight in Lithuania.

Abstract

Potato late blight caused by Phytophthora infestans is one of the most destructive potato diseases worldwide. This disease causes serious losses in Lithuania, too. Having analyzed the articles and reports previously published by other researchers the authors of this paper tried to link global warming issues with an increasing late blight problem in Lithuania. Also, we attempted to find out if there are any signs of diseases and pets which have not been known before or their influence has been insignificant so far. After reviewing previously done works and analyzing weather data we have concluded that late blight does not appear earlier in the potato growing season. This is primarily due to the lack of rain at the end of spring and first months of the summer. Other reasons are that potato production area has dwindled by half over a 10-year period. Currently potato production is concentrated in the farms practicing intensive crop protection. All these facts reduce the possibility of early occurrence of late blight. But high temperatures and drought in the first months of potato growing season favours the occurrence of early blight (Alternaria solani) and Colorado beetle (Leptinotarsa decemlineata).