The research on results of chemical control of thrips (Thysanoptera) took place in Krzeczowice near Przeworsk in 2008–2009. The seed dressings used were: Gaucho 600 FS (imidacloprid), Mesurol 500 FS (methiocarb) and Poncho 600 FS (clothianidin). They effectively protected maize plants against thrips feeding for a period of about 10 weeks from sowing. Chemical control of European corn borer (Ostrinia nubilalis Hbn.), performed in the first and second decade of July using formulations Karate Zeon 050 CS (lambda-cyhalothrin) and Proteus 110 OD (thiacloprid + deltamethrin), also effectively limited the number of thrips in the period of their mass occurrence. The highest effectiveness was observed following two applications of tested insecticides.
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