The research carried out in 2004 and 2006 focused on the effectiveness of chemical control of gout fly (Chlorops pumilionis Bjerk.), and the influence of selected insecticides used at various stages of spring wheat growth on economic results of treatments. Spring generation of gout fly caused damage from 11.4 to 60.2% of stems. The applied insecticides demonstrated effectiveness ranging from 45.5 to 100%. The wheat grain yield increased by 0.08 t/ha to 1.2 t/ha, at 9.3% on average. Slightly lower effects were achieved when insecticides were applied at the first date of pest control. Control measures applied at the second date differed more considerably with respect to their effectiveness and grain yield increase.
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