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Preemergence Herbicides as an Aid in Seeding Annual Rangelands

Published online by Cambridge University Press:  12 June 2017

Burgess L. Kay  and
Cyrus M. McKell
Burgess L. Kay
Affiliation:
University of California, Davis
Cyrus M. McKell
Affiliation:
University of California, Riverside, formerly Plant Physiologist, Crops Research Division, Agricultural Research Service, USDA, Davis, California
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Abstract

2-chloro-4,6-bis(ethylamino)-s-triazine (simazine), ethyl N,N-di-n-propylthiolcarbamate (EPTC), and 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) were shown to aid in the establishment of rose clover (Trifolium hirtum All.) and harding-grass (Phalaris tuberosa L. var. stenoptera (Hack.) Hitch.) by reducing competition from resident annual plants, primarily medusahead (Elymus caput-medusae L.). The success of preemergence herbicides was shown to depend on fall precipitation in amounts great enough to permit seed germination and plant growth before winter temperatures become limiting. The degree of weed control necessary to aid in seedling establishment was low, sometimes lower than could be measured by estimates of ground cover.

Type
Research Article
Information
Weeds , Volume 11 , Issue 4 , October 1963 , pp. 260 - 264
Copyright
Copyright © 1963 Weed Science Society of America 

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References

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