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Susceptibility of Pea Cultivars to Trifluralin

Published online by Cambridge University Press:  12 June 2017

Robert G. Harvey
Affiliation:
Dep. Agron., Univ. of Wisconsin, Madison, WI 53706
Earl T. Gritton
Affiliation:
Dep. Agron., Univ. of Wisconsin, Madison, WI 53706

Abstract

The relative susceptibility of ‘Alaska’ and ‘Perfection’ cultivars of peas (Pisum sativum L.) to trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) was studied in excised roots, and in greenhouse and field plantings. Elongation of excised Alaska and Perfection pea roots was reduced 32 and 25%, respectively, by 4 mg/L dosages of trifluralin in aseptic culture, and 25 and 10% by 1.68 kg/ha dosages in greenhouse-grown plants. Seedling emergence in the greenhouse and field was reduced or delayed in both cultivars by 1.68 kg/ha trifluralin. Yields of field-grown Alaska and Perfection peas were reduced by trifluralin dosages equal to and exceeding 0.84 and 1.68 kg/ha, respectively, when there was a June water deficit (8 cm). Yields were not reduced in either cultivar when June rainfall was near normal (10.9 cm).

Type
Research Article
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

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