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Mechanism of Intraspecific Selectivity of Cabbage to Nitrofen

Published online by Cambridge University Press:  12 June 2017

J. Francisco Pereira ,
Walter E. Splittstoesser  and
Herbert J. Hopen
J. Francisco Pereira
Affiliation:
Dep. of Hort., Univ. of Illinois at Urbana-Champaign, Urbana, Illinois 61801
Walter E. Splittstoesser
Affiliation:
Dep. of Hort., Univ. of Illinois at Urbana-Champaign, Urbana, Illinois 61801
Herbert J. Hopen
Affiliation:
Dep. of Hort., Univ. of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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Abstract

The plant characteristics which makes ‘Hybelle’ cabbage (Brassica oleracea var. capitata L.) relatively tolerant while ‘Rio Verde’ is susceptible to the toxic action of 2,4-dichlorophenyl-p-nitrophenyl ether (nitrofen) were investigated. No differences between ‘Hybelle’ and ‘Rio Verde’ were found in growth rates, light or dark germination, or stomata density. Little xylem or phloem translocation of nitrofen-14C occurred. Disruption and removal of the cuticle of ‘Hybelle’ increased its susceptibility to nitrofen while ‘Rio Verde’ with more than normal wax deposition was tolerant. Plants with less cuticle were more susceptible, regardless of cultivar. ‘Hybelle’ had more wax per unit surface than ‘Rio Verde’ and wax deposition increased with leaf age. Both cultivars were equally tolerant to nitrofen when 6 weeks old. ‘Rio Verde’ leaves absorbed nitrofen-14C twice as fast as ‘Hybelle’ leaves. The results show that the mechanism of intraspecific selectivity of cabbage to nitrofen is dependent on the amount of cuticular wax on the leaves at the time of nitrofen application.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 6 , November 1971 , pp. 647 - 651
Copyright
Copyright © Weed Science Society of America 

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