INFLUENCE OF INSECTICIDES FOR STORED GRAIN PROTECTION ON THE TECHNOLOGICAL PROPERTIES OF WINTER WHEAT

During storage, the aim is to keep the quality and quantity of agricultural products at a high level, without the risk of contamination. The most common storage pests are: Sitophilus granarius, Acarus siro, Caulophilus latinasus, Trimbolium consufusum and Trimbolium castaneum. Due to its multiple uses: in human and animal nutrition, winter wheat is one of the most valuable crops in the world. Seed quality can be influenced by the genetic factor also by the phytosanitary aspect during storage. Sitophilus granarius is one of the main storage pests that attacks wheat grains, barley and rye. During storage, the pests can greatly affect the quality of the seeds and also of the food. The flour resulting from the infested grains is unsuitable for consumption, having an unpleasant smell and bitter taste. The paper aimed to present the efficacy of four different concentrations (0.125%, 0.25%, 0.5% and 1%) of a modern liquid pyrethroid formulation against wheat weevil, in a three year experiment conducted in three different sizes grain warehouses. Also, the chemical composition of stored winter wheat seeds was determined using NIR spectroscopy, on unground samples. As expected, the highest percentage of dead insects, in a short period of time, was identified when the product was applied at the recommended dose (1%). Also small differences between studied parameters were revealed, but the quality of the samples was not lowered by the higher concentrations of insecticide.