Herbicide-based Weed Management in Miscanthus sacchariflorus
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Herbicide-based Weed Management in Miscanthus sacchariflorus Jong-Seok Song 1 & Soo-Hyun Lim 1 & Yeonhwa Lim 1 & Gyoungju Nah 1 & DoKyoung Lee 1,2 & Do-Soon Kim 1
Published online: 7 November 2015 # Springer Science+Business Media New York 2015
Abstract Although miscanthus is well known for its fast growth and high biomass productivity, its plant establishment and early growth are sensitive to weed interference. Thus, greenhouse and field experiments were conducted to establish an herbicide-based weed management system with preemergence (PRE) and post-emergence (POST) herbicides and their sequential applications. The plant establishment and early growth of miscanthus in the first 2 years of planting were significantly affected by weed interference, resulting in a greater than 90 % biomass yield loss in an untreated weedy control in which no herbicide was applied. PRE applications of S-metolachlor, alachlor, and pendimethalin were safe for M. sacchariflorus under both greenhouse and field conditions and showed good weed control under field conditions. POST applications of all of the tested auxinic herbicides, bentazon, thifensulfuron, and mesotrione were safe for M. sacchariflorus and showed good weed control. Sequential applications of PRE (S-metolachlor, pendimethalin or isoxaflutole) and POST herbicides (dicamba, bentazon, or mesotrione) showed better weed control than did their sole applications, resulting in better establishment. In particular, the sequential application of either S-metolachlor or pendimethalin followed by
Electronic supplementary material The online version of this article (doi:10.1007/s12155-015-9693-z) contains supplementary material, which is available to authorized users. * Do-Soon Kim [email protected] 1
Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
2
Department of Crop Sciences, University of Illinois at Urbana-Champaign, Champaign, IL 61801-4798, USA
mesotrione showed the most effective weed control (85 % less weeds than the untreated weedy control) with good safety for M. sacchariflorus and thus provided the best early establishment and biomass yield. The mesotrione-based sequential application achieved approximately 15.4 ton ha−1, 79 % of weed-free control in the second year of establishment. Therefore, our results suggest that the sequential applications of PRE and POST herbicides are essential for the first and second year of M. sacchariflorus cultivation. Keywords Biomass . Herbicide . Miscanthus . Sequential application . Weed control
Abbreviations ACCase Acetyl-CoA carboxylase ALS Acetolactate synthase DAP Days after planting HPPD 4-Hydroxyphenyl pyruvate dioxygenase POST Post-emergence PPO Protoporphyrinogen-IX oxidase PRE Pre-emergence PSII Photosystem II
Introduction Miscanthus has been studied as a bioenergy crop due to its high biomass productivity, wide environmental adaptability, and sustainable biomass production because of its rhizomatous p
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