EN
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.