Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (2002) 126, 161-168

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J.R. Warchalewski, J. Gralik, Z. Winiecki, J. Nawrot and D. Piasecka-Kwiatkowska (2002)
The effect of wheat alpha-amylase inhibitors incorporated into wheat-based artificial diets on development of Sitophilus granarius L., Tribolium confusum Duv., and Ephestia kuehniella Zell
Journal of Applied Entomology - Zeitschrift für angewandte Entomologie 126 (4), 161-168
Abstract: Artificial grain kernels made from ground wheat grain, commercial wheat starch and wheat proteinaceous alpha-amylase inhibitors were used as diets for adults of the granary weevil (Sitophilus granarius L). For the confused flour beetle (Tribolium confusum Duv.) and the Mediterranean flour moth (Ephestia kuehniella Zell.), a friable mixture of the diets was used. The results of feeding trials showed that the survival of S. granarius adults was not correlated with the soluble proteins extracted from wheat and amylolytic activity located in this protein fraction. On the other hand, the weight of dust (the index of feeding intensity) produced during feeding depended on the presence of alpha-amylase and trypsin inhibitors in wheat-based diets. Ephestia kuehniella larvae did not develop at all on a diet consisting of 50% wheat starch and 50% crude alpha-amylase inhibitors from wheat. The same diet lengthened the development time of T. confusum larvae by 15.1 days. These results attest to the existence of a specific native enzymatic apparatus in the alimentary canals of these three grain pests. However, the highly active insect alpha-amylase inhibitors appear to have a limited influence on the developmental parameters studied although some reduction of insects populations might be expected.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jan Nawrot

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Tribolium confusum Stored grain
Sitophilus granarius Stored grain
Ephestia kuehniella Stored grain
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