PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

The study was conducted to evaluate the efficacy of integrated management of stem canker and black scurf disease affecting the potato plant. The integrated management options were: T1 = Poultry manure (PM) + seed trematent (ST) with Azoxystrobin (0.05%), T2 = PM + ST-Azoxystrobin (0.10%), T3 = PM+ST-Boric acid (3.0%), T4 = PM + ST-Carboxin (0.20%), T5 = PM + ST- Carbendazim (0.10%), T6 = PM + soil drenching (SD) - Azoxystrobin (0.05%), T7 = PM + SD-Azoxystrobin (0.10%), T8 = PM + SD-Carboxin (0.20%), T9 = PM + SD-Carbendazim (0.10%) and T10 = Untreated control. The integrated management significantly influenced the disease incidence, yield attributes and yield of potato. The lowest disease incidence (11.2%) and percentage of disease index (4.58) were found in T7 (poultry manure at 5 t ha^-1 before 25 days of planting, DAP + soil drenching with Azoxystrobin at 0.10% during sowing and 45 DAP) followed by T6 (PM 5 t ha^-1 + soil drenching with Azoxystrobin at 0.05%). The minimum weight of russet (480 g plot^-1), deformed (450 g plot^-1) and Sclerotia infected (150 g plot^-1) tubers were also recorded in T7. The highest healthy tuber (1900.05 g plot^-1) and tuber yield (22.4 t ha^-1) were found in the same treatment. Therefore, poultry manure 5 t ha^-1 before 25 DAP + soils drenching with Azoxystrobin at 0.10% during sowing and 45 DAP can be recommended to produce healthy tubers and maximum tuber yield of potato.