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Phenology of Salt Rabbitbrush (Chrysothamnus nauseosus ssp. consimilis) and Greasewood (Sarcobatus vermiculatus)

Published online by Cambridge University Press:  12 June 2017

Bruce A. Roundy ,
James A. Young  and
Raymond A. Evans
Bruce A. Roundy
Affiliation:
U.S. Dep. Agric., Sci. Ed. Admin. Agric. Res., Renewable Resource Center, Univ. of Nevada, 920 Valley Road, Reno, NV 89512
James A. Young
Affiliation:
U.S. Dep. Agric., Sci. Ed. Admin. Agric. Res., Renewable Resource Center, Univ. of Nevada, 920 Valley Road, Reno, NV 89512
Raymond A. Evans
Affiliation:
U.S. Dep. Agric., Sci. Ed. Admin. Agric. Res., Renewable Resource Center, Univ. of Nevada, 920 Valley Road, Reno, NV 89512
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Abstract

Salt rabbitbrush [Chrysothamnus nauseosus (Pallas) Britt., ssp. consimilis (Greene)] and greasewood [Sarcobatus vermiculatus (Hook.) Torr.] grow slowly in early spring until mid to late May. They then begin a period of rapid growth, at which time susceptibility to foliar herbicides is probably greatest. Greasewood ceases rapid growth in mid June to early July, but salt rabbitbrush continues to grow rapidly until early August. Greasewood that resprouts after herbicide application has a longer rapid-growth period than shrubs in an untreated stand. An average leader length of 4 cm indicates that rapid growth of salt rabbitbrush is underway, and first opening of the flower buds indicates that rapid growth is over. Appearance of greasewood staminate spikes indicates that rapid growth has begun, and the first appearance of dried spikes indicates that growth has ceased. Simultaneous control of these shrubs with a single application of phenoxy herbicides may only be possible during the relatively short period when both are growing rapidly. This period may only occur from late May to mid June in some stands and years, but may occur from mid May to early July in other cases.

Keywords

Rangelandsweed ecologyweed controlrange management
Type
Research Article
Information
Weed Science , Volume 29 , Issue 4 , July 1981 , pp. 448 - 454
Copyright
Copyright © 1981 by the Weed Science Society of America 

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References

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