Plant Protect. Sci., 2015, 51(4):223-230 | DOI: 10.17221/105/2014-PPS

Management of maize stand height using growth regulatorsOriginal Paper

Tomáš SPITZER1, Petr MÍŠA1, Jan BÍLOVSKÝ1, Jan KAZDA2
1 Agrotest fyto, s.r.o., Kromeriz, Czech Republic; 2Department of Plant Protection
2 Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic

Effect in reducing maize plant height using growth regulators ethephon, chlormequat chloride (CCC), CCC + ethephon, and mepiquat chloride + prohexadione-Ca was studied in field experiments during 2010 and 2011. It was found that maize plant height could be reduced by as much as 125 cm (49% of control) using a double application of ethephon (576 g a.i./ha) at growth stages BBCH 18-19 and BBCH 34-36. The other growth regulators displayed weak or no influence. An optimum level of shortening was achieved using ethephon (576 g a.i./ha) at BBCH 34-36 (reducing plant height by 40-90 cm), but it is necessary to count upon yield loss of 0.5-0.6 t/ha.

Keywords: chlormequat chloride (CCC); ethephon; mepiquat chloride; prohexadione-Ca; grain yield

Published: December 31, 2015  Show citation

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SPITZER T, MÍŠA P, BÍLOVSKÝ J, KAZDA J. Management of maize stand height using growth regulators. Plant Protect. Sci. 2015;51(4):223-230. doi: 10.17221/105/2014-PPS.
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