Comparison of Different Weedicides on Multi-cut Sorghum Sudan Grass Hybrid for Productivity Enhancement and Control of Grassy Weeds
Comparison of Different Weedicides on Multi-cut Sorghum Sudan Grass Hybrid for Productivity Enhancement and Control of Grassy Weeds
Muhammad Riaz Gondal1,2*, Aqib Riaz4, Sultan Ahmad Rizvi2, Bushra Zulfiqar2, Waqas Naseem2, Humara Umar3, Ahmad Hussain1 and Mazher Iqbal3
ABSTRACT
Sorghum is an important fodder crop of Pakistan and weeds infestation reduces its yield and causes harvesting losses upto 20%. Current research aimed to investigate the efficacy of various weedicides to eradicate weedy grasses (S. brevifolius, D. aegyptium, C. dactylon, S. halepense, B.decufeedipedia.org. and P. hysterophorous) in multi-cut sorghum sudan grass hybrid (S.S. Hybrid). Four herbicides namely Clodinafop-propargayl (Clodinafop) @ 0. 25 and 0.375 kg ha-1, Paraquat and Glyphosate @ 1.5 and 2 L ha-1 and Fenoxaprop-p-ethyl (Puma super) @ 1.0 and 1.5 L ha-1 were applied on Pak Sudac variety of S. S. Hybrid and compared their control on weedy grasses with a weedy check (no weedicide application) during summer seasons of years 2018 and 2019. It was observed that application of Glyphosate and Paraquat @ 2 L ha-1, 1.5 L ha-1 reduced the grassy weeds after first cut of S.S. Hybrid up to 99.6%, 87%, 64.8% and 54.3 % respectively. However, somewhat better control i.e., 99.5%, 98.9%, and 95.5%, 94.66% respectively was obtained during 2019. Clodinafop and Puma super suppressed the grassy weeds only for 10-15 days during 2018 and remained unresponsive during 2019. With the reduction of weeds significant increase in fodder yield was recorded. Thus, Glyphosate and Paraquat at two dose levels i.e., 1.5 and 2.0 L ha-1 significantly increased the fodder yield to the tune of 189.38, 210.99 t ha-1 and 188.08, 188.94 t ha-1 respectively. Hence, the investigation lead to the conclusion that Glyphosate and Paraquat were fully effective to control weeds and enhance Fodder yield.
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