International Journal of Chemical Studies
Vol. 5, Issue 5 (2017)
Pre-emergence herbicide of oxy fluorfen on Weed control in transplanted rice
Author(s): R Sathya Priya, C Chinnusamy, P Murali Arthanari and P Janaki
Abstract: A field experiment were conducted for two years at Agricultural Research Station, Bhavanisagar of Tamil Nadu Agricultural University, during rabi season of 2010 and 2011 to evaluate the new formulation of oxyfluorfen (23.5% EC) on weed control in transplanted rice. Oxyfluorfen is a diphenyl-ether herbicide as a pre or post-emergence herbicide used for control of annual and perennial broad leaved weeds in a variety of field crops. Many of the field experiments revealed the bio-efficacy of this herbicide; however, no information is available on the phytotoxicity symptoms in different crops and bioassay study of this herbicide in succeeding crops under Indian tropical conditions. Based on two years field experimentation, it was found that pre-emergence (PE) application of oxyfluorfen at 400 g ha-1 gave significantly lower total weed density, weed dry weight and higher weed control efficiency at all the intervals. Oxyfluorfen at 200 g ha-1 as PE herbicide can keep the weed density and dry weight below the economic threshold level and increase the grain yield (5709 and 6645 kg ha-1) and straw yield (7102 and 7327 kg ha-1) in transplanted rice. Unweeded control accounted for lower grain yield (3382 and 4136 kg ha-1) which sequentially reflected through higher weed density and dry weight, respectively during both the years, due to heavy competition of weeds for nutrients, space and light. Even though some phytotoxicity effect was noticed in rice seedlings in higher doses immediately after application of oxyfluorfen, then the seedlings recovered and resulted in higher grain.
Pages: 271-275 | 707 Views 12 Downloads
How to cite this article:
R Sathya Priya, C Chinnusamy, P Murali Arthanari, P Janaki. Pre-emergence herbicide of oxy fluorfen on Weed control in transplanted rice. Int J Chem Stud 2017;5(5):271-275.