2024, Vol. 7, Special Issue 4

All the treatments reduced the disease severity of Alternaria solani compared to control. Least disease severity of 12.33% was observed in T₂- (ST with T. harzianum + 2 FS Tilt @ I^st at Ist disease Seen II^nd at 15 days interval), followed by the T₁- (ST with T. harzianum + 2 FS Bavistin @ I^st at I^st disease Seen II^nd At 15 days interval) of 14.40%, T₇- (ST with T. harzianum + 2 FS Zinger Extract 10% @ I^st at I^st disease Seen II^nd At 15 days interval) of 42.53% showed least effective in comparison to all the treatments but was significantly superior over control (65.84%). Highest yield were recorded in T₂- (ST with T. harzianum + 2 FS Tilt @ I^st at I^st disease seen II^nd at 15 days interval) (455 gm/pot) and percent increase in yield 97.57%. fallowed by T₁- (ST with T. harzianum + 2 FS Bavistin @ Ist at Ist disease seen II^nd at 15 days interval) (405gm/pot and 75.70%), T₃ and T₄. Among the all treatments T₂ responsible for yield increase as well as reduced disease severity in potato plants experiment.