An Influence of Lowered Temperature on the Migration Activity of the Population of Rhizopertha Dominica F. (Coleoptera, Bostrichidae)

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 also in the temperature lowered to 22°C and 60±5% relative humidity. The...

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Bibliographic Details
Published inJournal of plant protection research Vol. 49; no. 3; pp. 263 - 266
Main Author Klys, Malgorzata
Format Journal Article
LanguageEnglish
Published Warsaw Polish Academy of Sciences 01.09.2009
Subjects
females
habitats
Insect migration
Mortality
Population growth
Relative humidity
Rhyzopertha dominica
storage pests
temperature
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Summary: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 also in 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.
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ISSN:1427-4345
1899-007X
1899-007X
DOI:10.2478/v10045-009-0040-2