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Journal of Biological Sciences

Year: 2002 | Volume: 2 | Issue: 1 | Page No.: 25-27
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Authors

M. S. Kabir

M. R. Uddin

M. A. Salam

M. A. Gaffer

M. K. N. Bari

Keywords

The experiment was carried out to evaluate the efficacy of different herbicides and to compare the economics of hand weeding and herbicidal weed control in transplant aman rice cv. BRRI Dhan 32. There were fourteen treatments viz., three levels of Acetochlor 90 EC, three levels of Ronstar 25 EC, three lvels of Set-off 20 WG, three levels of Golteer 5 G, hand weeding and weedy check (no weeding). Among the applied herbicides, Acetochlor 90 EC @ 150 ml a.i. ha‾1 showed the best performance in killing weeds (98.96%) but it was statistically identical with Acetochlor 90 EC @ 100 ml a.i. ha‾1 and Golteer 15 G @ 30 kg ha‾1 . The benefit cost ratio (BCR) was the highest (1.46) in Acetochlor 90 EC @ 100 ml a.i.ha‾1 with highest profit (Tk. 13294 ha‾1 ) was obtained from the same treatment which was Tk. 2812.00 higher than the profit (Tk. 10482.00) obtained from the tratment Golteer 5 G @ 25 kg/ha. It was found that Acetochlor 90 EC @ 100 ml a.i. ha‾1 showed its superiority over all other treatments used for controlling weeds in transplant aman rice.
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