New insight into the Delia platura Meigen caused alteration in nutrient content of soybean (Glycine max L. Merill)

Climate change has brought about an increasing level of seedcorn maggot (Delia platura Meigen, 1826) (Diptera: Anthomyiidae) damage in Hungary. In order to have a more accurate understanding of the effects of these plant injuries induced by the larvae of D. platura, the nutrient content of soybean (Glycine max L. Merill.) was studied. Our results show that the moisture, raw fat, raw fibre, and raw ash content of the batches damaged by D. platura were significantly less in comparison with that of the control samples. In response to the deleterious effect of the insect, the infected soybean plants showed forced ripening (P = 0.004) (P > 0.05). The difference of moisture content between damaged and control samples was 2.30% on average. The fact of nutritional value loss was also reflected by the alteration of sugar mobilisation. As the result of this experiment the sucrose breakdown to glucose and fructose during the germination was significantly slower in the damaged seeds than that of the control ones. Overall, this late and surprising damage caused by D. platura led to the forced ripening of the affected soybean plants and a significant change in their nutritional values. Based on the herein reported results, it is presumable that in cases when the current climatic extremities, which are envisaged to occur more frequently in the future, and effects of agricultural practices will be coincided in the future a qualitative change of the produced soybean batches can be expected through the damage caused by this fly species

Bab felhasználása a pontytakarmányozásban

Kísérletünk célja a babzsizsik (Acanthoscelides obtectus, Say 1831) által károsított bab (Phaseolus vulgaris) alkalmazási lehetőségének vizsgálata volt pelletált pontytápban. A károsított bab mellett nem károsított bab felhasználásával is készítettünk kísérleti tápot, kontrollként pedig egy kommersz pontytápot használtunk, amelynek fehérje és energiatartalmával megegyezőként állítottuk össze a kísérleti tápjainkat. Az előzetes eredmények alapján megállapítható, hogy a bab táplálóanyag tartalmát tekintve alkalmas pontytáp összetevő, azonban 70% körüli arányban alkalmazva rontja a halak teljesítményét. A halliszt részleges vagy teljes kiváltásában való felhasználásához a megfelelő mennyiség meghatározása további vizsgálatokat igényel

Nutrient content restructuring and CT-measured density, volume attritions on damaged bean caused by Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae)

Leguminous plant products have 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 up to 50–60% loss in stored bean items. The bean weevil causes 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. Furthermore, our purpose was to determine accurately the decrease in the volume and density alteration in beans caused by this important stored product pest using CT-assisted imaging analysis. Our results showed that the nutritional arrangement in damaged beans was caused by A. obtectus. The measured nutrient content increment in damaged samples can be explained by the presence of extraneous organic material which originates from perished specimens of the bruchin pest. This is a negative phenomenon in bean items used as forage, because of the loss of valuable proteins and 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 tissue density in damaged beans can be accounted for by the consumption of starch present at a high ratio and that of the dense reserve components in the cotyledons