ORIGINAL ARTICLE
An influence of lowered temperature on the migration activity of the population of Rhizopertha dominica F. (Coleoptera, Bostrichidae)
 
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Pedagogical University of Cracow, Institute of Biology, Department of Ecology, Wildlife Research and Ecotourism Podbrzezie 3, 31-054 Kraków, Poland
CORRESPONDING AUTHOR
Małgorzata Kłyś
Pedagogical University of Cracow, Institute of Biology, Department of Ecology, Wildlife Research and Ecotourism Podbrzezie 3, 31-054 Kraków, Poland
 
Journal of Plant Protection Research 2009;49(3):263–266
 
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ABSTRACT
The subject of the study was the lesser grain borer Rhizopertha dominica F. – a dangerous pest of stored grain. The study was carried out in the laboratory at a temperature of 31°C, the optimal temperature for this species,and alsoin the temperature lowered to 22°C and 60±5% relative humidity. The main aim of the research was to investigate the migration activity of R. dominica in lowered temperature. In addition the population dynamics, mortality and sexual ratio in a population of R. dominica were also analyzed. It was shown that lowering the temperature to 22°C caused an increase in the migration activity of R. dominica in the initial phase of infesting a new habitat. A larger migration and mortality of females were observed. In addition, the population growth was slow and prolonged in time at the temperature of 22°C as compared to the optimal temperature. Lowering the temperature did not influence the mortality of the R. dominica population
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
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