Summary: | This diploma thesis is focused on solving of fungicide efficiency against leaf fungal pathogens of winter wheat (Triticum aestivum L.). 9 fungicides were followed in compare with unprotected control variant. There were realized 4 replications of each variant. The experiment was located in Veľké Zálužie in mayze production region. Application of fungicide treatment was provided in growth stage BBCH 39-64 (T2 application). After 14 days was checked a fungal efficacy against leaf pathogens and damaging of leaf area was evaluated. The most observed leaf patogens during vegetation of 2013 were: Septoria leaf blotch (Mycosphaerella graminicola an. Septoria tritici), Tan spot of wheat (Pyrenophora tritici-repentis an. Drechslera tritici-repentis) and Powdery mildew (Blumeria graminis). Attack by these diseases was: 5,5 % (epoxiconazole + fenpropimorph), 5,63 % (azoxystrobin + cyproconazole), 8,38 % (tebuconazole + prothioconazole), 9,68 % (cyproconazole + propiconazole), 12 % (propiconazole + prochloraz), 12,5 % (spiroxamine + tebuconazole + triadimenol), 13 % (epoxiconazole + metrafenone + fenpropimorph), 15,5 % (tebuconazole + prochloraz), 16,45 % (spiroxamine + prothioconazole + tebuconazole) leaf area and the highest attack was 22,1 % in control variant. On the basis of this attack the fungicide efficiency was calculated for each substance active of each fungicide. Series was following: 75,1 % (epoxiconazole + fenpropimorph), 74,53% (azoxystrobin + cyproconazole), 62 % (tebuconazole + prothioconazole), 56,2 % (cyproconazole + propiconazole), 45,7 % (propiconazole + prochloraz), 43,44 % (spiroxamine + tebuconazole + triadimenol), 41,2 % (epoxiconazole + metrafenone + fenpropimorph), 29,9 % (tebuconazole + prochloraz), 25,56 % (spiroxamine + prothioconazole + tebuconazole). The economical profitability of fungicides is following: : azoxystrobin + cyproconazole (186,74 eur), epoxiconazole + fenpropimorph (180,7 eur), spiroxamine + prothioconazole + tebuconazole (123,64 eur), cyproconazole + propiconazole (85,93 eur), spiroxamine + tebuconazole + triadimenol (70,24 eur), propiconazole + prochloraz (67,1 eur), tebuconazole + prothioconazole (58,22 eur), tebuconazole + prochloraz (28,33 eur), epoxiconazole + metrafenone + fenpropimorph (5,35 eur). The most economical effective fungicide in 2013 against leaf fungal pathogens of winter wheat was with mix of strobilurine and triazol substance. |