Integrated disease management of Phytophthora blight of pigeonpea caused by Phytophthora drechsleri f. sp. Cajani

Phytophthora blight of pigeonpea incited by Phytophthora drechsleri f. sp. cajani is one of the most destructive and wide spread disease. All the test fungicides, bioagents, botanicals and organic amendments integrated (pot culture, sick soil) for the management of Phytophthora drechsleri f. sp. cajani were found to encourage seed germination and reduce pre- and post-emergence mortalities in pigeonpea cv. BDN1. Of the treatments imposed, [M et alaxyl + Mancozeb] (SD @ 2g/lit water) + Mancozeb (ST @ 3 g/kg soil) +T. harzianum (ST @ 10g/kgseed)+ Garlic (SD 50ml/kg soil) + Neem cake (SA @50 g/kg soil) treatment was found most effective with cent per cent seed germination (100.00%), significantly least average mortality (2.50%) and highest average mortality reduction (93.99%). This was followed by the treatments viz., (M et alaxyl + Mancozeb), (M et alaxyl + Mancozeb) + Mancozeb and (M et alaxyl+Mancozeb) + Neem cake with seed germination each 85.00%, average mortality, respectively of 16.52, 16.18 and 16.18 per cent and average mortality reduction, respectively of 66.42,67.25 and 67.25 per cent, Neem cake and (M et alaxyl + Mancozeb) + Garlic with seed germination each 80.00%, average mortality, respectively of 22.5 and 19.37 per cent and average mortality reduction, respectively of53.26 and 59.51 per cent.