A field experiment were conducted for two years at Agricultural Research Station, Bhavanisagar of Tamil Nadu Agricultural University, during kharif season of 2009 and 2010 to evaluate the new formulation of oxyfluorfen (23.5% EC) on weed control in onion. Weeds constitute one of the biggest problems in agriculture that not only reduce the yield and quality of onion but also utilize essential nutrients. Hence, weed control is essential for increasing onion production. Based on two years field experimentation, it was found that pre-emergence application of oxyfluorfen (23.5% EC) at400 g.ha-1 gave significantly lower total weed density, weed dry weight and higher weed control efficiency at all the intervals. Application of new formulation of oxyfluorfen (23.5% EC) at200 g.ha-1 as pre-emergence herbicide can keep the weed density and dry weight below the economic threshold level and increase the bulb weight (42.56 and43.87 g) and yield (15940 and15610 kg.ha-1) in onion. Unweeded control accounted for lower bulb yield which inturn reflected through higher weed index of 60.6 and 56.1 per cent, respectively during both the years, due to heavy competition of weeds for nutrients, space and light.
P 2412, a medium duration, high yielding medium slender rice culture was released as PY 6 (Subramania Bharathi) in January, 2000 for general cultivation in Pondicherry and Karaikal regions of the Union Territory of Pondicherry. It matures in 135 to 140 days. It has recorded a mean yield of 5852 kg ha in station trails and 5570 kg ha' in the adaptive research trials/on farm trails. Its overall mean yield in 74 locations (1993 to 1999) was 5534 kg har with 4 (ADT 38) to 19 per cent (Co 43/ I White Ponni) increased yield over checks. It is medium to tall in stature with compact panicle and medium size white boy grain. This variety is moderately resistant to blast and gall midge. PY 6 can be sown in September and is the best alternative to I White Ponni
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