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Abstract
Glyphosate is a widely used herbicide for minimum tillage technology because it effectively kills broadleaf and grass weeds. Mixing glyphosate with other herbicide that has a different mechanism, such as 2,4-D may increase control efficacy and prevent the evolved of resistant weeds. Research was conducted to obtain the effective dose of glyphosate and 2,4-D mixtures and to evaluate the effect of the herbicide mixtures on the growth rate and yield of sweet corn. Depression on summed dominance ratios (SDR) and increased number of dominant weeds were observed after the application of glyphosate and 2,4-d mixtures. The interaction of the herbicide mixtures was observed optimum at the doses of glyphosate and 2,4-D of 1.94 and 1.5 L ha-1, respectively, with maximum of net assimilation rates (NAR) at 4-6 weeks after planting of 0.0003617 g cm-2 days-1. Plant growth rates (PGR) and NAR were observed maximum by a single treatment of glyphosate at a dose of 1.5 L ha-1 which were 2.23614 and 2.23607813 g cm-2 days-1, respectively. Yield of sweet corn observed as fresh-weight of cobs was found maximum of 129.41 g with a single treatment of glyphosate at 2,018 L ha-1.
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Copyright (c) 2019 Bilman Wilman Simanuhuruk, Marulak Simarmata, Ayyi Aprianto

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References
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References
Adnan, Hasanuddin, dan Manfarizah. 2012. Aplikasi beberapa dosis herbisida glifosat dan paraquat pada sistem tanpa olah tanah (TOT) serta pengaruhnya terhadap sifat kimia tanah, karakteristik gulma dan hasil kedelai. Jurnal Agrista 16(3):136-137.
Barcelo, F. J. V. and L.E. Cruz. 2015. Evaluation of mixtures of herbicide in the weed control in sugar cane field in three types of soil in Majibaco Las Tunas Province. Cultivos Tropicales 36(1):117-122.
Burhanudin, I.S. Banuwar dan I. Zulkarnain. 2015. Pengaruh sistem olah tanah herbisida terhadap kehilangan unsur hara dan bahan organik akibat erosi di Laboratorium Lapangan Terpadu Fakultas Pertanian Universitas Lampung. Jurnal Teknik Pertanian Lampung 13(3):275-282.
Choudhary, D., P.K. Singh, N.K. Chopra and S.C. Rana. 2016. Effect of herbicides and herbicide mixtures on weeds in wheat. Indian J. Agric. Res. 50(2):107-112. DOI: 10.18805/ijare.v50i2.9587.
Damalas, C.A. 2004. Herbicide Tank Mixtures: Common Interactions. Int. J. Agric & Biol. 6(1):2019-121.
Derpsch, R., T. Friedrich, A. Kassam, L. Hongwen. 2010. Current Status of Adoption of No-till Farming in the World and Some of Its Benefits. Int J of Agr and Biol Engineering 3(1):1-25. DOI: 10.3965/j.issn.1934-6344.2010.01.0-0.
Faqihhudin, M.D., Haryadi, dan H. Purnamawati. 2014. Penggunaan herbisida IPA glifosat terhadap pertumbuhan, hasil dan residu pada jagung. Jurnal Ilmu Pertanian 17(1):1-12.
Hunt, R. 1981. Plant Growth Analysis: Studies in Biology, second ed. Vol 96. Edward Arnold, London.
Kumari, S., S. Das, R. Kumar, and Kavita. 2018. Herbicide mixture for enhancing weed control efficiency and yield of onion (Onion cepa L.). Int. J. Curr. Microbiol. App. Sci. Special Issue (7): 2710-2714.
OMAFRA. 2017. Guide to weed control. Publication 75. Ontario Ministry of Agriculture, Food and Rural Affairs, Toronto, ON. 458 pp.
Robinson, A P., D M. Simpson, and W.G. Johnson. 2012. Summer annual weed control with 2,4-D and glyphosate. Weed Tech. 26(4):657–660. DOI: 10.2307/23358266.
Shaner, D.L. 2014. Herbicide handbook. 10th ed. Weed Science Society of America, Champaign, IL. 513 pp.
Simarmata, M., C.D. Sitanggang, and Djamilah. 2015. The shifting of weed compositions and biomass production in sweet corn field treated with organic compost and chemical weed controls. Agrivita 37(3):226-236. DOI: 10.17503/Agrivita-2015-37- 3-p226-236.
Simarmata, M., M. Taufik, and Z.Z.A. Peranginangin. 2017. Efficacy of paraquat and glyphosate applied in water solvents from different sources to control weeds in oil palm plantation. ARPN J. Agric. Biol. Sci. (12): 58-64.
Soltani, N., C. Shropshire, P.H. Sikkema. 2018. Tank mixture of glyphosate with 2,4-D accentuates 2,4-D injury in glyphosate-resistant corn. Canadian J. Plant Sc. 98(4): 889-896. DOI:10.1139/cjps-2017-0241
Triyono K. 2010. Pengaruh Dosis Glifosat dan Jarak Tanam Terhadap Pertumbuhan Gulma dan Hasil Jagung (Zea mays).Skripsi. Universitas Slamet Riyadi Surakarta. Surakarta
Tu, M., C. Hurd, J.M. Randall. 2001. Weed Control Methods HandbookWeed Control Methods Handbook: Tools and Techniques for Use in Natural Areas. The Nature Conservancy, 210 pp.
Utomo, D.W.S., A. Nugroho, dan H.T. Sebayang. 2014. Pengaruh aplikasi herbisida pratanam cuka (C2H4O2), glifosat dan paraquat pada gulma tanaman kedelai (Glycine Max L.). Jurnal Produksi Tanaman 2(3): 216-217.
Wardoyo, S.S., O. Haridjaja, dan Widiatmaka. 2001. Distribusi herbisida glifosat di dalam tanah dan pengaruhnya terhadap ciri tanah serta pertumbuhan kedelai. J. Ilmu Pert. Indon. 10(2):40-45
Wehtje, G. and C.H. Gilliam. 2012. Cost-Effectiveness of Glyphosate, 2,4-D, and Triclopyr, Alone and in Select Mixtures for Poison Ivy Control. Weed Technology 26(3):469-473.oDOI: 10.2307/23264342 hn