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Plant Movement and Seed Dispersal of Russian Thistle (Salsola iberica)

Published online by Cambridge University Press:  12 June 2017

George P. Stallings ,
Donald C. Thill ,
Carol A. Mallory-Smith  and
Lawrence W. Lass
George P. Stallings
Affiliation:
Dep. Plant, Soil, and Ent. Sci., Univ. Idaho, Moscow, ID 83843. Senior author's current title and address is: Prod. Dev. Rep., Monsanto Ag. Co., P.O. Box 379, Okemos, MI 48805
Donald C. Thill
Affiliation:
Dep. Plant, Soil, and Ent. Sci., Univ. Idaho, Moscow, ID 83843. Senior author's current title and address is: Prod. Dev. Rep., Monsanto Ag. Co., P.O. Box 379, Okemos, MI 48805
Carol A. Mallory-Smith
Affiliation:
Dep. Plant, Soil, and Ent. Sci., Univ. Idaho, Moscow, ID 83843. Senior author's current title and address is: Prod. Dev. Rep., Monsanto Ag. Co., P.O. Box 379, Okemos, MI 48805
Lawrence W. Lass
Affiliation:
Dep. Plant, Soil, and Ent. Sci., Univ. Idaho, Moscow, ID 83843. Senior author's current title and address is: Prod. Dev. Rep., Monsanto Ag. Co., P.O. Box 379, Okemos, MI 48805
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Abstract

Russian thistle plant movement and seed dispersal were studied in 1991 and 1992 by placing Russian thistle plants in the center of wheat fields in eastern Washington. Three adjacent site treatments, with 24 plants on each site, were used each year; wheat stubble, summerfallow planted to winter wheat, and a “stationary” site. Plants in the “stationary” site were anchored to the ground to prevent tumbling. Plants in the stubble and summerfallow sites were allowed to tumble naturally. Individual plant movement was monitored and recorded weekly by satellite global positioning systems technology. Average estimated seed number per plant at the beginning of the experiment was 57,400 in 1991 and 66,000 in 1992. The direction plants moved correlated highly with wind direction. Some plants moved a maximum distance of 4069 m in 6 wks, while other plants moved only 60 m because of variable winds and being compressed by snow or frozen into wheat stubble. Average percentage seed loss in 1991 and 1992 for stationary plants was 15 and 26%, and for tumbling plants was 48 and 66%, respectively.

Keywords

Chlorsulfuron, 2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]benzenesulfonamideRussian thistle, Salsola iberica Sennen and Paul #3 SASKRwheat, Triticum aestivum LChlorsulfurongeographic information systems (GIS)global positioning systems (GPS)herbicide resistancetumbleweedSASKR
Type
Weed Biology and Ecology
Information
Weed Science , Volume 43 , Issue 1 , March 1995 , pp. 63 - 69
Copyright
Copyright © 1995 by the Weed Science Society of America 

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