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Shoot Zone Activity of Trifluralin and Nitralin

Published online by Cambridge University Press:  12 June 2017

W. L. Barrentine  and
G. F. Warren
W. L. Barrentine
Affiliation:
Department of Horticulture
G. F. Warren
Affiliation:
Department of Horticulture
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Abstract

When localized treatments of α,α,α-trifluoro-2,6-di-nitro-N,N-dipropyl-p-toluidine (trifluralin) and 4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline (nitralin) were applied to the shoot zone of sorghum (Sorghum bicolor (L.) Moench, var. RS-610) and cucumber (Cucumis sativus L., var. Wis. SMR-15) before seedling emergence, the most susceptible sites were the sorghum coleoptilar node and the cucumber hypocotyl hook. The longer before emergence that the sorghum shoot was exposed to the herbicides, the greater was the injury. However, if herbicide concentration was sufficient, the growing point just above the sorghum coleoptilar node was inhibited by both herbicides when applied after seedling emergence. Maximum uptake of 14C-trifluralin and 14C-nitralin occurred through the coleoptilar node and hypocotyI hook of sorghum and cucumber, respectively. Rate of entry, uptake, and translocation of 14C-trifluralin was greater than that of 14C-nitralin in sorghum and cucumber shoots.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 1 , January 1971 , pp. 37 - 41
Copyright
Copyright © Weed Science Society of America 

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References

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