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Time of Emergence and Seed Production of Longspine Sandbur (Cenchrus longispinus) and Puncturevine (Tribulus terrestris)

Published online by Cambridge University Press:  12 June 2017

Rick A. Boydston
Rick A. Boydston*
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Irrigated Agric. Res. and Ext. Ctr., Prosser, WA 99350
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Abstract

Fall-planted longspine sandbur began to emerge in April, peaked in late April or May, and continued at low levels through October. During the first year after seeding, 98% of the total seedlings emerged prior to June. Fall-planted puncturevine began to emerge in late April or May and continued through October. Puncturevine emergence was multipeaked and 75% of each season's total emerged prior to mid-July. A similar number of puncturevine seedlings emerged the second and third years after planting as in the first. The emergence pattern for a species was similar each year regardless of how long the seed had lain in the soil. Longspine sandbur required 7 to 13 weeks from emergence to heading and produced approximately 2600, 1300, 180, and 3 spikes per plant when planted in May, June, July, and August, respectively. Puncturevine flowered within 3 to 4 weeks after emergence when temperatures were favorable and produced an average of 5600, 5200, 3600, and 200 burs per plant when planted in May, June, July, and August, respectively.

Keywords

Longspine sandbur, Cenchrus longispinus (Hack.) Fern. ♯3 CCHPApuncturevine, Tribulus terrestris L. ♯ TRBTEPlanting dateseedling emergenceCCHPATRBTE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 38 , Issue 1 , January 1990 , pp. 16 - 21
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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