Vol. 3 No. 1
Effect of clomazone+ 2, 4-DEE on growth and productivity of rice and on total bacteria in soil.
Author(s): PRITAM GHOSH, R. K. GHOSH, MITHUN SAHA AND DIPALI MANDAL
Abstract: A field experiment was conducted during kharif 2000 and boro 2000 2001 at the Viswavidyalaya Farm, Kalyani, Nadia to find out the effect of clomazone + 2, 4-DEE on growth and productivity of rice and on total bacteria in soil. The results of the experiment revealed that hand weeding at 20 and 40 days after transplanting recorded the highest grain yield of rice due to higher weed control efficiency and better crop growth which was closely followed by clomazone 175 + 2, 4-DEE 270 g ha-1 in kharif and clomazone 200 + 2, 4-DEE 180 g ha-1 in boro. The herbicide mixture was phytotoxic to the crop but it disappeared within two or three weeks after application depending on the season of cultivation. Higher dose of clomazone showed a significant detrimental effect on total bacteria over that of its lower dose whereas the influence of 2, 4-DEE was the reverse of clomazone on total bacteria. However, the population of total bacteria decreased on the 60th day as compared to the 3rd day and then increased on the 85th day.
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