Confirming the relationship between infestation of winter wheat with Tilletia caries and the quantity of Fusarium mycotoxins in harvested grain
2010
Prokinova, E.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Ochrany Rostlin | Vanova, M.,Agrotest Fyto, Kromeriz (Czech Republic) | Stockova, L.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic) | Sykorova, S.,Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic)
The objective of the study was to confirm or to disprove the connection between infestation of winter wheat with Tilletia caries and the quantity of Fusarium toxins in the harvested grain. From 2007 to 2009, small-plot experiments were conducted with 26 winter wheat varieties tested in 2007 and 35 varieties tested in 2008. In 2009, 46 winter wheat varieties inoculated with T. caries and 30 control varieties were tested. The varieties presented varied levels of susceptibility to infestation with Tilletia caries and Fusarium head blight (FHB). The percentage of spikes infested with blight was evaluated symptomatically. The percentage of grains infected with Fusarium spp. was found out using the wet chamber method. The Ridascreen Fast DON immunochemical kit was used in determining the deoxynivalenol (DON) content, the Ridascreen Fast Zearalenon was used for determining zearalenone (ZEA) and the T-2 toxin level was determined using the Ridascreen Fast T-2 toxin. Three-year results showed that there was no correlation between infestation of winter wheat with T. caries and Fusarium spp. There was no evidence of correlation between blight infection and concentrations of DON, ZEA or T-2. As expected, a close direct relationship was confirmed between the frequency of grains infected with Fusarium spp. and the DON level (the coefficient of 0.71648) and the ZEA level (the coefficient of 0.674679). Any connection between the infestation with Fusarium spp. and the content of T-2 toxin was not confirmed. However, there was a significant difference in DON and ZEA concentrations at different rates of blight infection, between the groups with T. caries infestation rate 0-5% and over 25%.
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