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Tolerance of cotton expressing a 2,4-D detoxification gene to 2,4-D applied in the field

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Charles, G. W., Constable, G. A., Llewellyn, D. J. and Hickman, M. A. (2007) Tolerance of cotton expressing a 2,4-D detoxification gene to 2,4-D applied in the field. Australian Journal of Agricultural Research, 58 (8). pp. 780-787. ISSN 1836-0947


Article Link: https://doi.org/10.1071/AR06375


The tolerance to 2,4-dichlorophenoxy acetic acid (2,4-D) of a genetically modified (transgenic) cotton (Gossypium hirsutum) expressing a 2,4-D detoxification gene was compared with conventional (non-transgenic) cotton over 2 seasons. The 2,4-D was applied over-the-top of cotton in the field at 7–17 nodes of crop growth at rates of 0.004–1.12 kg a.i./ha. The transgenic cotton displayed better tolerance to 2,4-D than conventional cotton at all growth stages and herbicide rates. Some damage was apparent on both types of cotton at 2,4-D rates of 0.07 kg/ha and above, with damage most pronounced when the plants were exposed at 7 nodes. The transgenic cotton also had some tolerance to MCPA. Commercial use of transgenic, 2,4-D-tolerant cotton has the potential to greatly reduce problems of 2,4-D damage in cotton from accidental spray drift and herbicide residues in spraying equipment, where plants are predominantly exposed to low rates of 2,4-D.

Item Type:Article
Keywords:genetically modified organism, herbicide resistance, MCPA, transgenic
Subjects:Plant culture > Field crops > Other economic plants
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Live Archive:19 Feb 2024 00:06
Last Modified:19 Feb 2024 00:06

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