Research performed in the years 1999–2002 was carried out in Great Poland region on varieties of winter wheat Elena and Tercja. Experiments included three programmes of wheat cultivation: 1 – Conventional winter wheat protection based on recommendations for commercial fields; 2 – Integrated pest management programme where the control of diseases and insect pests was carried out on the background of thresholds of harmfulness/noxiousness, and weather forecasts; 3 – Untreated, without protection against diseases and pests. Two levels of nitrogen fertilization were applied in the experiments (120 kg N/ha and 170 kg N/ha) and the newest plant protection products were used for controlling fungal pathogens and noxious insects. The occurrence of diseases and insect pests, as well as beneficial entomofauna was determined in relation to each experimental variant, and occurring changes were analysed. Effectiveness of disease and pest control were calculated. Grain yield and its quality were determined and economical profitability for both conventional and integrated programmes calculated. It was shown that a high profitability can be obtained through the application of integrated pest management, as a result of correct choice and application of plant protection products, as well as proper choice of wheat cultivars and appropriate nitrogen fertilization.

In the years 2000 and 2001 the effectiveness of control of take-all (Gaeumannomyces graminis var. tritici) in winter wheat with seed dressing fungicides at different levels of root infection was studied. Seeds were treated with siltiofam, fluquinconazole or a standard fungicide Baytan Universal 094 FS. At low level of root infection recorded at GS 75 siltiofam and fluquinconazole significantly reduced root infection as compared to untreated control by 73.5-89.9% and 65.5-89%, respectively. At a medium level of infection the respective values were 56.2 and 54.9%. No significant differences between the efficacy of the two new fungicides were stated. Standard seed treatment product showed only limited activity in the early spring. Reduction of winter wheat root infection by 1% caused the increase of grain yield by around 1%.