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Bio-efficacy of Bensulfuron Methyl + Pretilachlor 6.6% Gr Against Weed Suppression in Transplanted Rice

Md. Abdullah Al Mamun,
Former SSO,
Agronomy Division, BRRI, Gazipur

M. K. A. Bhuiyan
SSO
Agronomy Division, BRRI, Gazipur

M A J Mridha
CSO & Head
Agronomy Division, BRRI, Gazipur

M. A. Badshah
SSO
Agronomy Division, BRRI, Gazipur

Rakiba Shultana, ,, ,
SSO
Agronomy Division, BRRI, Gazipur

S. A. lslam
SSO
Agronomy Division, BRRI, Gazipur

Abstract/ Executive Summary:

Two experiments were conducted at Bangladesh Rice Research Institute (BRRI), during Boro, 2009 and Aus. 2010 to evaluate the performance of Bensulfuron methyl + Pretilachlor 6.6% GR for weed suppression and its impacts on transplanted rice. Bensulfuron methyl + Pretilachlor 6.6 % GR @ 490, 652 and 8l5g a.i. ha^-1 were applied. Pretilachlor 500 EC @ lL ha^-1, weed free and unweeded control was used for comparison. Among the weed flora five broad leaves. Two grasses and two sedges were infesting the experimental plots. The weeds were Echinochloa crus-galli, Scirpus maritimtts, Monocioria taginalis, Cypents dffirmis, Cltyllon dacnlon, Marsilea minuta, Ludwigia octovalvis, Nymphaea-nouchali and Desntodium trifoliunt. Applicarion of Bensulfuron methyi + Pretilachlor 6.6% GR @ 652g a.i. ha^-1 gave more than 80% weed control efficiency, Lower number and dry weight of weeds which ultimately resulted in higher yield attributes and grain yield of transplanted rice that were comparable to the standard in both seasons.

Keywords: Bio-efficacy, Weed suppression, Transplanted rice

Location: BRRI Gazipur and Rangpur

Start Date: 00-00-2010

End Date: 00-00-2011

Program Area: Pest Management

Commodity: Rice

Objectives:

To evaluate the performance of Bensulfuron methyl + Pretilachlor 6.6% GR for weed suppression and its impacts on transplanted rice

Methodology:

Two field experiments were conducted at research farm of Bangladesh Rice Research Institute, Gazipur during Aman season in 2009 and 2010. The experiment was laid out in a Randomized complete block design (RCBD). Net plot size was 4m x 3m. Rice variety BRRI dhan49 was used as a test crop. Bensulfuron methyl + Pretilachlor 6.6% GR @ 490, 652 and 815g a.i. ha^-1 were applied. Pretilachlor 500 EC @ lL ha^-1, weed free and unweeded control was used for comparison. Fertilizers such as nitrogen, phosphorus and potassium (N, P, and K) and sulphur (S) were applied at 100, 15, 40 and 5 kg/ha, respectively. The whole phosphorus and potassium and one third of nitrogen were applied at the time of sowing. The remaining doses of nitrogen were applied in two splits at tillering and panicle initiation, respectively. The crop was harvested at maturity. The data were analyzed following analysis of variance (ANOVA) and the statistical program MSTAT-C.

Source of Information: Bangladesh J. Weed Sci. 2 (1&2): 9-13, December 2011

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Tirty thousands taka

Total Budget (Tk.) : Tirty thousands taka

Achievement/Findings:

Herbicide based weed management requires less labour and cost. It ensures satisfactory yield and higher return from rice cultivation. Bensulfuron methyl + pretilachlor 6.6% GR @ 652g a.i. ha^-1controlled weeds effectively and produced optimum grain yield in both seasons. No plant injury was observed during the crop growing period due to the application of Bensulfuron methyl + pretilachlor 6.6% GR.

Knowledge Management: Journal