Article contents
The Interaction of Atrazine and EPTC on Navy Bean
Published online by Cambridge University Press: 12 June 2017
Abstract
Navy bean (Phaseolus vulgaris L.) treated with the combination of EPTC (S-ethyl dipropylthiocarbamate) and atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] developed more chlorosis of the leaves than beans treated with atrazine alone. Navy bean yields in field studies in 1972, were reduced 39% when grown in the presence of 0.55 kg/ha of atrazine and 3.4 kg/ha of EPTC, whereas the single application of either herbicide reduced yields 0 to 14%, respectively. In 1973, atrazine at 0.28 kg/ha did not significantly reduce yields, but combinations of 0.28 kg/ha of atrazine plus 2.2, 3.4, and 4.5 kg/ha of EPTC, reduced yields 40, 30, and 62% respectively. The combination of atrazine and EPTC also reduced plant weight and delayed flower and pod development. EPTC was found to increase wind blast damage under conditions of low relative humidity, high winds, and limited soil moisture. EPTC at 2.2, 3.4, and 4.5 kg/ha reduced the chloroform-soluble leaf extract from the surface of leaves and scanning electron micrographs confirmed that EPTC at 10-6 M altered leaf surface waxes. EPTC at 10-5 and 10-6 M increased the transpiration rate of plants. Increased uptake of 14C-atrazine from solution was associated with increased transpiration.
- Type
- Research Article
- Information
- Copyright
- Copyright © 1976 by the Weed Science Society of America
References
Literature Cited
- 7
- Cited by