Vol. 7, Special Issue 6 (2019)
Chemicals weed control management in aerobic rice
Author(s): DK Verma, Pankaj Kumar Singh, Saurabh Verma, SP Giri, RP Singh, RB Singh, DP Singh and Arun Kumar Singh
Abstract: Rice is the staple food for the 2/3rd population of the world. In India rice is predominantly grown by transplanting in puddle soil with continuous flooding. This method requires very huge amount of water, labor and energy for land preparation, nursery raising, transplanting and weeding leading to high cost of cultivation. Furthermore mechanized puddling also affects soil health due to the indiscriminate dispersion of soil particles, soil becoming compact and making tillage operations difficult requiring more energy in succeeding crops such as wheat. An alternative to this method of crop establishment is aerobic direct seeding because it requires very less water, labor and capital inputs. One most important benefit of this method is that crop matures 7-10 days earlier than the transplanted crop and it was beneficial for cultivation of next season crops viz. potato and wheat. Irrigated “aerobic rice†is a new system being developed for the cultivation of rice in water scarcity area of the U.P. and other parts of the country. The major constraint of this crop establishment technique is high weed pressure than conventional puddled transplanting systems (Rao et al., 2007). In aerobic condition dry tillage and alternate wetting and drying conditions create conducive environment for the germination and growth of weeds resulted in grain yield loss of 50-90%. Thus, weeds are the most severe constraint to aerobic rice production and timely weed management is very crucial for increasing the productivity of aerobic rice. Upland and aerobic rice growers of India use mechanically weeding of their crops two or three times per season, investing upto 190 person days/ha in hand weeding. Chemical weed control i.e. use of herbicides is one of the prominent option to control the weed menace in the aerobic rice. Both pre-emergence and post-emergence herbicides can be used in aerobic rice fields and they are effective, if properly used (De Datta et al., 1996 and Singh et al., 2006). In view of the above observations herbicides and their combinations were evaluated to control the weeds in the aerobic rice production system.
Pages: 121-123 | 580 Views 82 Downloads
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How to cite this article:
DK Verma, Pankaj Kumar Singh, Saurabh Verma, SP Giri, RP Singh, RB Singh, DP Singh and Arun Kumar Singh. Chemicals weed control management in aerobic rice. International Journal of Chemical Studies. 2019; 7(6): 121-123.
