Volume : 3, Issue : 5, May - 2014

Kresoxim methyl, a strobulin fungicide for managing Asian Soybean rust caused by Phakopsora pachyrhizi Syd. and enhancement of yield in soybean

Shamarao Jahagirdar

Abstract :

Field screening of new fungicide molecules and botanicals against Asian soybean rust Phakopsora pachyrhizi Syd. was taken up during kharif growing season 2009 and 2010 at Main Agricultural Research Station, Dharwad. pooled analysis over two years recorded minimum severity of 24.5 PDI in two applications of Kresoxim Methyl @ 1.0 ml/l at 30 DAS and at flower initiation stage followed by two applications of Hexaconazole @ 1ml/lit starting first at 30 days after sowing (31.1PDI). Maximum PDI was recorded in untreated check (91.3 PDI). The pooled analysis over two years, recorded mean maximum seed yield of 17.10q/ ha in two applications of Kresoxim Methyl @1ml/l starting first at 30 days after sowing and second at flower initiation followed by 15.45 q/ha at two applications of Hexaconazole@1ml/l starting first at 30 days after sowing and second at flower initiation. The minimum seed yield of 9.29q/ ha was recorded in untreated check The large scale demonstration over one acre area in two talukas revealed that two sprays with Kresoxim methyl @1ml/lit has helped in realization of 4.61% seed yield increase over Hexaconazole @1ml/lit.during 2011–12 and 8.41% seed yield over Hexaconazole @1ml/lit during 2012–13. highest net income (Rs.27550) with cost benefit ratio of 1:2.01 was obtained with Kresoxim Methyl @ 1.0 ml/l at 30 DAS and at flower initiation stage followed by two applications of Hexaconazole @ 1ml/lit starting first at 30 days after sowing (Rs.26850/– and C:B ratio of 1:2.34).Thus, application strobulin fungicide Kresoxim methyl @0.1% twice was found effective in the management of soybean rust and enhancement of soybean yield per unit area in India.