Loss of sensitivity of Blumeria graminis f. sp. tritici to triadimenol applied as seed treatment

The objective of this work was to evaluate the loss of sensitivity of Blumeria graminis f. sp. tritici (Bgt) to the fungicide triadimenol as seed treatment. The experiments were carried out in a growth chamber with temperature and photoperiod partially controlled. A mixture of four isolates of Bgt was used and maintained on potted wheat plants in the same environment. The treatments consisted of triadimenol fungicide (150 Baytan SC®) applied at three concentrations of 150, 250, 350 mL/100 kg of seeds. The inoculation was performed by placing pots with wheat plants heavily colonized by Bgt amo...