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Vol. 4 No. 1 (2020): International Journal of Applied Biology

Date Log

Submitted
Jun 13, 2020
Published
Jun 29, 2020

EFFICACY OF SUNFLOWER RESIDUES AND HERBICIDES IN CONTROLLING WEEDS IN TRANSPLANTED RICE

https://doi.org/10.20956/ijab.v4i1.10360
Shaon Samanta Tanu
Patuakhali Science and Technology University, Bangladesh
Purnendu Biswas
Patuakhali Science and Technology University, Bangladesh
Sultan Ahmed
Patuakhali Science and Technology University, Bangladesh
Swadesh Chandar Samanta
Patuakhali Science and Technology University, Bangladesh

Corresponding Author(s) : Swadesh Chandar Samanta

samantapstu@yahoo.com

International Journal of Applied Biology, Vol. 4 No. 1 (2020): International Journal of Applied Biology

Abstract

The experiment was conducted at Agronomy Field Laboratory of Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh  from July 2018 to November 2018 to find out the effect of sunflower residues and herbicides on weed control and yield of T. Aman rice. Weed control methods tested were T1= weedy check,T2 = Weed free check, T3 = Pendimethalin,T4 = Pretilachlor,T5= Butachlor,T6 = Pyrazosulfuron ethyl,T7 = Bensulfuron methyl + Acetachlor,T8 = Bispyriback sodium,T9 =2,4-D amine,T10 =MCPA,T11 = Sunflower residues ,T12 = Sunflower residues + 100%Pyrazosulfuron ethyl,T13 = Sunflower residues + 75%Pyrazosulfuron ethyl,T14 = Sunflower residues + 50%Pyrazosulfuron ethyl. The weed spectrum of the experimental field consisted of all the three groups of weeds viz., grasses (15.78%), sedges (59.02%) and broad-leaved weeds (25.2%). The dominants weeds were Cynodon dactylonand Echinochloa crusgalli among grasses; Cyperus difformis, Fimbristylis miliacea and Scirpus supinus among sedges and Jussiaea decurrens among broad-leaved weeds.  Hand weeding recorded the highest weed control efficiency (99.05%) and weedy check recorded the lowest. Among different herbicides applied alone, butachlor had the highest weed control efficiency (87.59%).Hand weeding produced the highest grain yield (5.14 t ha-1) which was statistically similar to butachlor, pendimethalin, pretilachlor,  bensulfuron methyl + acetachlor and sunflower residues  + 100% pyrazosulfuronethyl.  Application of sunflower residues along with the reduced rate (75 or 50%) of pyrazosulfuron ethyl had effective weed control and satisfactory yield comparable to butachlor. The farmers can use this technology as an eco-friendly approach in transplanted Aman rice field.
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Author Biographies

Purnendu Biswas, Patuakhali Science and Technology University, Bangladesh
Professor, Department of Agronomy
Sultan Ahmed, Patuakhali Science and Technology University, Bangladesh
Professor, Department of Agronomy
Swadesh Chandar Samanta, Patuakhali Science and Technology University, Bangladesh
Professor, Department of Agronomy
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