EFFECT OF FUNGICIDES ON DEOXYNIVALENOL CONTENT IN WINTER WHEAT (Triticum aestivum L.)

The aim of the present study was to analyze the effect of four fungicidal products on Gibberella ear rot (Fusarium graminearum) on yield quality and quantity of winter wheat (Triticum aestivum L.), cv. Venka 1 and choose the more appropriate application rate. The field experiment was performed in 2022 in Ruse region, Bulgaria. A local variety of winter wheat sensitive to Fusarium ear rot was chosen. The test product (Prothiconazole 174 g/l + Pydiflumetofen 60 g/l) was applied in three dose rates - 0.9, 1.2, and 1,5 l/ha. As reference products, three registered fungicides were selected: Prosaro 420 SC (Prothioconazole 210 g/l + Tebuconazole 210 g/l) -1 l/ha, Delaro (Prothioconazole 125 g/l + Trifloxystrobin 125 g/l) -1 l/ha, and Input (Prothioconazole 160 g/l + Spiroxamine 300 g/l) -1 l/ha and 1.25 l/ha. Nine variants, including untreated inoculated control and seven different treatments, were analyzed. The results showed a significant decrease in the disease severity and incidence after applying all the products and a reduction of deoxynivalenol content in the grain. The yield of all the fungicide treated plots increased.