Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Sept 1995

Effect of 2,4-D and Triclopyr on Annual Bedding Plants

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Page Range: 122 – 125
DOI: 10.24266/0738-2898-13.3.122
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Abstract

Greenhouse trials were conducted to evaluate annual flower response to simulated drift of Weedar 64 (dimethylamine salt of 2,4-D) and Turflon Amine (triethylamine salt of triclopyr). Mature annual flowers responded differently to low concentrations of Weedar 64 and Turflon. The order for species from most sensitive to least sensitive was petunia > begonia = marigold =pansy =statice > geranium =impatiens =rose periwinkle =salvia. Rates less than 128 g ae/ha (0.11 lb ae/A) caused only slight injury. Injury was expressed in reduced flower production and callus. Turflon suppressed flowering 19% more than Weedar 64. Both herbicides reduced flowering at rates greater than 100 g/ha (0.088 lb/A).

Keywords: triclopyr; 2,4-D; spray drift; Weedar 64, (dimethylamine salt of 2,4-D), (2,4-dichlorophenoxy)acetic acid; Turfloll Amine, (triethylamine salt of triclopyr), [(3, 5, 6-trichloro-2-pyridinyl)oxy] acetic acid; begonia, (Begonia x semperflorens—cultorum Hort.) ‘Espresso Rose’ and ‘Party White’; geranium, (Pelargonium x hortorum Bailey) ‘Cardinal and Pink Orbit’; impatiens (Impatiens Wallerana Hook.) ‘Bright Eye’, ‘Accent Coral’, ‘Accent Apricot’and ‘Accent White’; marigold, (Tagetes erecta L.) ‘Perfection Gold’, ‘Bonanza Mixture’ and ‘Legend Yellow’ and (Tagetes patula L.) ‘Boy O'Boy’; pansy (Viola x Wittrockiana L.) ‘Majestic Mixture’; petunia (Petunia x hybrida Hort. Vilm.) ‘Daddy Mixture’, ‘Supercascade Lilac’, ‘Simply Madness’ and ‘Red Madness’; salvia (Salvia farinacea Benth.) ‘Empire Lilac’; statice (Limonium sinuatum (L.) Mill.) ‘Regal Mixed Colors’; rose periwinkle (Catharanthus roseus (L.) G. Don) ‘Pretty In Pink’ and ‘Bright Eye’
Copyright: Copyright, All Rights Reserved 1995

Contributor Notes

Journal Paper No. J-15831 of the Iowa Agric, and Home Econ. Exp. Stn., Ames, IA 50011. Project No. 2062.

2Research Assistant, Department of Agronomy.

3Professor, Department of Horticulture.

4Professor, Department of Agronomy.

Received: 11 May 1995
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