Original paper

Emigration Activity in Lesser Grain-Borer Rhyzopertha dominica in the Initial Stage of Infesting Stored Wheat Grain (Coleoptera: Bostrichidae)

Kłyś, Małgorzata

Entomologia Generalis Volume 34 Number 1-2 (2012), p. 91 - 96

16 references

published: Nov 29, 2012

DOI: 10.1127/entom.gen/34/2012/91

BibTeX file

ArtNo. ESP146003401013, Price: 9.90 €

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The subject of the study is a population of lesser grain-borer Rhyzopertha dominica (Fabricius 1792), a dangerous pest of stored grain. Laboratory experiments were conducted in order to determine the emigration activity of R dominica in the initial stage of wheat grain storage infestation. The studies were carried out at a temperature of 28°C and 60±5 % relative humidity (RH). The assessment of emigration activity was based on the analysis of population numbers and sex ratios. It was found that the lesser grain-borer population displays very intensive emigration activity independent of population-related and environmental factors. It was also found that R dominica females manifest a higher emigration drive than males. This is particularly harmful because fertilized females move quickly within grain heaps, attacking and contaminating new batches of stored cereal grain.


Rhyzopertha dominica (Fabricius 1792)emigrationpopulation dynamicssex ratio