Vol. 10, Special Issue 1, Part H (2026)

Powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt) is a persistent foliar disease of wheat in cool and temperate regions, where its biotrophic nature and rapid polycyclic growth lead to notable yield loss. The pathogen reproduces asexually through abundant conidia and sexually via chasmothecia, aiding efficient spread and survival. Although host resistance and cultural practices help reduce disease, fungicides remain the most dependable option in areas with recurring epidemics. This study evaluated the compatibility and field performance of seven fungicidal treatments-Azoxystrobin + Cyproconazole, Azoxystrobin + Difenoconazole, Tebuconazole + Trifloxystrobin, Propiconazole, Tebuconazole, Mancozeb and Bayleton-against wheat powdery mildew. All treatments significantly lowered disease severity and improved yield components over the untreated control. Azoxystrobin 18.2% w/w + Difenoconazole 11.4% w/w SC showed the best performance, recording the highest thousand-grain weight, followed by Azoxystrobin + Cyproconazole. Overall, triazole-strobilurin combinations proved more effective than single fungicides, supporting their role in integrated disease management.