Wheat grain has been irradiated by 200 keV and 305 keV of pulsed electron beams for changing of sowing parameters. Total microbial number, germination and germination energy were compared for both of electron kinetic energy settings for the same ranges of the energy input. The electron beam of 305 keV showed better disinfecting effect for energy input values of less than 4 J/g. That mode eliminates seed germination ability after irradiation of more than 2 J/g and can be used for grain storing. The mode of 200 keV beam keeps seed germination ability up to 5 J/g with the similar disinfecting effect after the irradiation energy input of more than 4 J/g. This mode can be used for pre-sowing seed treatment procedure.
The species composition of weed plants in the oilseed rape agrocoenoses in the south part of Western Siberia (Tomsk region) have been studied. There are more than 80 species of weed plants occupied oilseed rape fields on this territory. Euphorbia virgata, Convolvulus arvensis, Stachys palustris, Cirsium setosum and Sonchus arvensis belongs to the most common and widely distributed species of perennial weeds. In the seed lots of Brassica napus L. Metzg. cultivated in Tomsk Oblast the fruit and seeds of more than 40 weed seeds have been founded.
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