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The paper presents harmfulness estimation of the most important diseases and pests occurring in main agricultural and horticultural crops in Poland in 2009. Presented data are based on the results of field observations provided by Plant Health and Seed Inspection Service Inspectors. In 2009 the increase of agrophages’ occurrence was recorded in cases of: Blumeria graminis DC., Puccinia recondita Rob...
In 2008, the authors observed a carrot crop infestation by Agrotis segetum and its important influence on root yield. A significantly less pest occurrence and harmfulness were recorded in 2009 – the year characterized by frequent rainfall, although the number of caught males was threefold higher as compared to the dry year 2008. Compared the results of 2-year studies with literature data it was found...
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