Author(s):

S Thiruvarassan, G Manickam, R Anitha and M Jayachandran

Abstract: Field investigations were carried out during early seasons of both 2015 and 2016 at Sugarcane Research Station, Cuddalore to ascertain the bio-efficacy of Metsulfuron Methyl 20% WG as Post - emergence application against the control of broad leaf weeds in sugarcane. The treatments constituted of early post emergence application of Metsulfuron methyl 20%WG @8.0 &6.0 g.a.i / ha along with 0.2 % non-ionic surfactant exerts comparable suppression of weeds especially almost all broad leaved weeds and resulted with highest weed control efficiency of 79.1 and 84.2 respectively on 30 and 60 days after application (DAA) during 2014 and with 79.1 and 84.0 during 2015 were accounted with the above treatments. Moreover the maximum values of varied growth, yield parameters viz., cane length (283 and 278 cm), cane girth (3.2 and 3.4 cm) individual cane weight (2.20 and 2.24 kg), millable canes (1,25,000 and 1,23,600) cane yield (140.43 and 137.84 t / ha) and sugar yield (16.86 and 15.67 t / ha) in respective years of study. Regardless the cropping years, the control registered the lowest values of all the above parameters.

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