Short Communications

High availability of alachlor affects the roots and general growth of sunflower seedlings

Published in: South African Journal of Plant and Soil
Volume 12 , issue 1 , 1995 , pages: 42–43

DOI: 10.1080/02571862.1995.10634333

Author(s): J. Allemann Department of Plant Production and Soil Science, Republic of South Africa , C.F. Reinhardt Department of Plant Production and Soil Science, Republic of South Africa

Keywords: Alachlor , phytotoxicity , sunflower , tolerance

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Abstract

The tolerance to alachlor [α-chloro-2′,6′?diethyl-N-(metoxy- methyl) acetanilide] of three sunflower (Helianthus annuus L.) cultivars was evaluated in an aqueous medium in a glass- house. Alachlor (0.79 - 6.32 mg L⁻¹) caused significant reductions in the root and shoot growth of sunflower seedlings exposed to the herbicide in nutrient solution. The roots of seed- lings exposed to alachlor became progressively shorter, thicker and darker in colour as the herbicide concentration increased. Differential cultivar tolerance was demonstrated.

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