Nutrient content restructuring and CT-measured density, volume attritions on damaged bean caused by Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae)
Sándor Keszthelyi 1, A,C-F  
Dávid Horváth 2, C
Ádám Csóka 3, C
György Kovács 4, C
Tamás Donkó 5, A-B,D
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Department of Plant Production and Plant Protection, Faculty of Agricultural and Environmental Sciences, Kaposvár University, H-7400 Kaposvár, Guba S. str. 40, Hungary
Department of Entomology, Faculty of Horticulture Science, Szent István University, H-1118 Budapest, Villányi str. 29-43, Hungary
Health Center, Kaposvár University, H-7400 Kaposvár, Guba S. str. 40, Hungary
Analytical Minds Ltd., H-4032 Debrecen, Civis str. 8, Hungary
Institute of Diagnostic Imaging and Radiation Oncology, Kaposvár University, H-7400 Kaposvár, Guba S. str. 40, Hungary
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Sándor Keszthelyi   

Department of Plant Production and Plant Protection,, Kaposvár University, Faculty of Agricultural and Environmental Sciences,, H-7400 Kaposvár, Guba S. str. 40, H-7400 Kaposvár, Hungary
Submission date: 2017-11-27
Acceptance date: 2017-12-18
Journal of Plant Protection Research 2018;58(1):91–95
Leguminous plant products have a great nutritional and economic importance in the European Union, which is reflected by its protein policy. These harvested yields are risked by stored product pests, such as Acanthoscelides obtectus Say, which can cause even 50-60% loss in stored bean items. The bean weevil cause both quantitative and qualitative damage to seeds. We aimed to map the qualitative damage of this devastating pest, which deteriorates the nutritional content of bean kernels. Besides, our purpose was to determine accurately the decrease in the volume and density alteration in bean caused by this important stored product pest using CT-assisted imaging analysis. Our results showed that the nutritional arrangement in damaged bean has been caused by A. obtectus. The measured nutrient content increment in damaged samples can be explained by the presence of extraneous organic material which is originating from perished specimens of the bruchin pest. This is a negative phenomenon in bean items used as forage, because of the disappearance of valuable proteins and occurring of rancidity in herbal oils. Weight loss triggered by developing larvae was 49.42% in examined bean items. The use of 3D technologies has greatly improved and facilitated the detailed investigation of injured seeds. The density (75,834 HU; 41.93%) and the volume (296.162 mm3; 26.21%) values measured by CT of the examined samples were significantly decreased. The decreasing of tissues density in damaged beans can be accounted for by the consumption of starch present at high ratio and that of the dense reserve components in the cotyledons.
The authors have declared that no conflict of interests exist.
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