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Increasing area of willow plantations for energetic purposes as well as the lack of plant protection products registered for protection of willow cultivation often leads to mass pest infestation which cause significant economic losses. The aim of experiments conducted in 2009–2010 by the Institute of Plant Protection – National Research Institute in Poznań was to assess the efficacy of the following plant protection products: Calypso 480 SC, Karate Zeon 050 SC and Mospilan 20 SP in reducing the number of willow beetles (Phratora sp.). All tested insecticides showed a high efficacy and might be recommended for controlling the pest Phratora sp. on willow plantations.
The highest species diversity of willow beetles Phratora (Col., Chrysomelidae) was found on selected sites of willows growing on banks of rivers (Salicetum triandro-viminalis Lohm.). On shortrotation coppice willows only one species Phratora vulgatissima was present. This species belongs to the most dangerous pests occurring on Salix viminalis plantations in south-eastern Poland.
The Polish energy potential development could in future depend on biomass production. The cultivation area of short rotation willow decreased in last years. One of the main reason was the epidemic occurrence of pests and diseases. The aim of this study was to recognize the main pests and pathogens of short rotation willow and to investigate the possibility of control. Field observation of pests and diseases were conducted in 2007–2009 at Field Experimental Station Winna Góra. Plant protection tests were performed in 2008–2009. The predominant pathogen and the most dangerous was recognized as Melampsora epitae, the casual agent of rust. It could caused plant defoliation and decreased biomass yield. An important disease was also anthracnose, caused by Glomerella cingulata. The pathogen caused leaf necroses and shoot death. Fungicide treatment showed high efficacy in the control of pathogens. The treatment also increased the biomass yield. Among pests the most important were Earias chlorana and Phratora vitellinae. Insecticide treatment reduced leaf damage caused by pests.
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