Department of Plant Pathology, Punjab Agricultural university, Ludhiana-141004
In Abohar region 45.5, 36.4 and 27.3 per-cent of the samples showed the presence of Pseudomonas fluorescens, Trichoderma harzianum, and Trichoderma viride, respectively. Similarly, from Hoshiarpur region 50, 43.8 and 31.1 per-cent of samples showed the presence of P. fluorescens, T. harzianum and T. viride. Trichoderma viride (Tv1) and P. fluorescens (Pf14) isolate produced largest inhibition zones of 5 mm, 4.6 mm, respectively. Out of 10 isolates of T. harzianum, tested against Phytophthora parasitica, the growth of pathogen was least (1.5 cm) in presence of Th9 isolate as compared to 8 cm in the control. Per-cent growth inhibition of Phytophthora parasitica in presence of Th9 isolate of T. harzianum was maximum (81.3%)
