In soybean cv. Fiskeby, among the Mi plants obtained after seed irradiation with fast neutron (at the dosis of 100 rad), a changed plant was found. The plant was considerably greater and formed much more seeds in comparison with control. In the next generations of the single plant, several macromutations were found. Among the mutants, following seem to be of greater breeding value: tall, giants and with remarkable bigger leaves (tab. 3). From theoretical point of view, of interest are also climbing and semi-climbing mutants. The Mi plant certainly was an example of the rare complex mutation.
The confused flour beetle is one the most common pest insects invading stored food products with high content of starch. The object of the studies was to determine the adaptability of the pest to infest different quality groups of wheat grain divided into grain size fractions. Survivability of the confused flour beetle taking into consideration the quality and quantity of nutrient substance was studied; as well as the course and length of this developmental cycle. The results of performed studies revealed that a wheat cultivar factor significant affected development of the pest. It was also stated that pest beetles preferred grain of wheat cultivars with low protein content and pure technological quality of gluten. In contrast, grain of cultivars characterized by a high technological quality such as Korweta and Jasna were more tolerant to infestation by this pest.