An experiment was conducted during Kharif 2012 and 2013 at Agricultural Research Station, Dhadesu-gur, University of Agricultural Sciences, Raichur, Karnataka, India, to evaluate the phytotoxicity and bio efficacy of pyrazosulfuron ethyl 10 % WP (wettable Powder) @ 5, 10, 15 and 20 g a.i./ha against the weeds in transplanted rice. Sprays of Saathi (Market Sample) @ 15 g a.i./ha (gram active ingredient/hectare), Pretilachlor 50% EC @ 500 ml a. i/ha, hand weeding at 15 and 40 days after planting (weed free check) and a weedy check (untreated check) were also maintained. The dominant weeds were Echinochloacolona, Panicum repens, Cynodondoctylon, Lud-wigiaparviflora, Leptochloachinensis and Cyperus sp. Application of pyrazosulfuron ethyl 10 % WP @ 20 g a.i./ha was recorded significantly higher grain yield (6266 kg/ha) by controlling the associated weeds in transplanted rice without any phytotoxic effect.
Bio-efficacy, Dry weight, Grain yield, Phytotoxicity, Weeds
Annonymous, (2015). Annual report 2014-15, Department of Agriculture and Cooperation Ministry of Agriculture, Government of India Krishi Bhavan, New Delhi
Chopra, N.K. and Chopra, N. (2003). Effect of doses and stages of application of pyrazosulfuron ethyl on weeds in transplanted rice. Indian Journal of Weed Science, 35(1&2): 42â€“46
Gill, H.S. and Vijayakumar (1969). Weed indexâ€“a new method for reporting weed control trial. Indian Journal of Agronomy, 14(1):96â€“98
Gomez, K.A. and Gomez, A.A. (1984). Statistical Procedures for Agricultural Research, John Wiley & Sons. Inc., New York.
Jackson, M.L. (1967). Soil Chemical Analysis. Prentice Hall of India Pvt. Ltd., New Delhi, pp. 183-192
Mani, V.S., Pandita, M.L., Gautam, K.C. and Das, B. (1973). Weed killing chemicals in potato cultivation. Indian Farming 23: 7â€“13
Marshall, E. J. P. (1988). Field-scale estimates of grass weed populations in arable land. Weed Research, 28(3):191-198
S. Pal, R.K. Ghosh, H. Banerjee, R. Kundu and A. Alipatra, (2012). Effect of pyrazosulfuron-ethyl on yield of transplanted rice. Indian Journal of Weed Science, 44(4): 210â€“213, 2012
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)