Asanul Hoque1, Abhijit Saha2, Biman Maity3* and Victor Sarkar4
1, 2Department of Agronomy, Culcutta university,
3, 4Department of Agricultural Extension, SMS Malda KVK
Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal-736165
Email: asanulhoque1994@gmail.com
Received-01.02.2022, Revised-18.02.2022, Accepted-27.02.2022
Abstract: Sesame (Sesamum indicum L.) is one of the oldest crops known to humans. There are archeological remnants of sesame dating to 5500 BC in the Harappa Valley in the Indian subcontinent (Bedigian and Harlan 1986). India ranks first in area and second in sesame production by contributing 23.2% and 18.5% of the world area and production, respectively. The field experiment on evaluation of pre and post emergence herbicide for chemical weed management in sesame over summer season of 2020 was conducted at malda krishi vigyan kendra,old Alluvial Zone, Uttar Banga KrishiViswavidyalaya, Malda, West Bengal. The experimental site is situated at 26º8’N latitude and 78 º E longitudes having an average altitude of 8.75m above mean sea level. There were eight treatments, the details of which are given below T1- Weedy Check T2- Weed Free T3- Pendimethalin 30EC (Pre-emergence) @0.50 kg a.i/ha (R) /0.75 kg a.i/ ha (I) T4- Quizalofop-ethyl (Post emergence) 50g a.i /ha at 20 DAS after sowing T5- Sodium Acifluorfen 16.5% + Clodinafop -Propargyl 8%EC (Premix) @100g a.i/ ha at 20 DAS T6- T3+ Hand weeding at 20 DAS T 7- T3 f b T4 T8- T3 f b T5. Where weed free check recorded minimum weed density throughout the crop season. Similar findings was although obtained by Punya et al. (2001). At 30 DAS, the treatments which received T3- Pendimethalim 30 EC (Pre-emergence@0.50kg a.i./ha,T4- Quizalofop-ethyl (Post-emergence) 50g a.i/ha at 20 DAS T5- Sodium Acifluorfen 16.5%+Clodinafop-Propergyl 8% EC(premix)@100g a.i/ha at 20 DAS ,T6- T3+ Hand weeding at 20 DAS,T7-( T3+T4) and T8- T3+T5 and weed free check (T2) recorded lowest number of sedge, grass and broad leaved weed density than unweeded check(T1). Where weed free check recorded minimum weed density throughout the crop season. Similar findings were although obtained by Punya et al. (2001). At 30 DAS, the treatments which received T3- Pendimethalim 30 EC (Pre-emergence@0.50kg a.i./ha,T4- Quizalofop-ethyl (Post-emergence) 50g a.i/ha at 20 DAS T5- Sodium Acifluorfen 16.5%+Clodinafop-Propergyl 8% EC(premix)@100g a.i/ha at 20 DAS ,T6- T3+ Hand weeding at 20 DAS,T7-( T3+T4) and T8- T3+T5 and weed free check (T2) recorded lowest number of sedge, grass and broad leaved weed density than unweeded check(T1). With this view need proper weed management for increasing sesame productivity. Therefore, chemical weed management is most efficient and acceptable approach to combat with the weed control problems. Hence, present study was under taken.
Keywords: Pre and post emergence herbicide, Weed density, Weed control efficiency
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