Nutritional preferences of the lesser grain borer Rhizopertha dominica F. (Coleoptera, Bostrichidae) under conditions of free choice of food
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Pedagogical University of Cracow, Institute of Biology Department of Ecology, Wildlife Research and Ecoturism Podbrzezie 3, 31-054 Kraków, Poland
Małgorzata Kłyś
Pedagogical University of Cracow, Institute of Biology Department of Ecology, Wildlife Research and Ecoturism Podbrzezie 3, 31-054 Kraków, Poland
Journal of Plant Protection Research 2006;46(4):359–367
The subject of this study was Rhizopertha dominica F. population. The primary question referred to was the process of the lesser grain borer population spread depending on nutritional preferences of this species. The aim of performed laboratory experiments was to examine the adults’ ability to choose preferred kinds of food i conditions of free migration among them and to analyze the dynamics of population size. Sex ratio and the migration rate were also analyzed. Four types of food were used during the experiments: wheat, oat flakes, pearl barley and semolina. The experiments were conducted at 28°C and 60 ± 5% of relative humidity. Results of the study revealed that oat flakes were the most favourable nutriment for adult R. dominica whereas wheat grain was the most favourable for the population size since larvae were protected by grains and thus their increased number could survive. No population development in semolina was observed. It was the result of too small granulation of this food.
The authors have declared that no conflict of interests exist.
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