NZPPS   ·  Journal home   ·   Past issues  ·  This volume   ·   Previous abstract   ·   Next abstract



New Zealand Plant Protection 65 (2012): 54-58

Changes in yellow bristle grass (Setaria pumila) incidence in Waikato dairy pastures over 4 years

K.N. Tozer, C.A. Cameron and T.K. James

ABSTRACT

Thirty-nine Waikato dairy pastures have been surveyed annually each February, for 5 years, to quantify changes in cover of yellow bristle grass and to determine if management factors influence this. After a severe drought, yellow bristle grass ground cover increased from 4 to 11% (2008 to 2009) and has since remained at this level. Ryegrass cover declined after the drought and has not returned to pre-drought levels while clover cover has increased. There was a much higher than average 2011/2012 summer rainfall, possibly causing the reduced summer grass and broadleaf weed cover measured in February 2012. By the end of the survey period, there was no reduction of yellow bristle grass cover from any of the following farm practices aimed to improve pasture performance: summer cropping, undersowing, oversowing and non-selective herbicide applied during summer.

Keywords: yellow bristle grass, Setaria pumila, survey, incursion, pasture, ground cover.

Related articles
pdfNutritive value and production of yellow bristle grass (Setaria pumila) in Waikato dairy pastures: validating Farmax model assumptions
K.N. Tozer, C.A. Cameron, R.M. Greenfield and C.B. Glassey (2015)
New Zealand Plant Protection 68: 98-104
pdfThe potential distribution of yellow bristle grass (Setaria pumila) in New Zealand
S.L. Lamoureaux and G.W. Bourd˘t (2014)
New Zealand Plant Protection 67: 226-230
pdfFenoxaprop for control of yellow bristle grass in pasture and its efficacy on other C4 grasses
T.K. James, A. Rahman, C.A. Dowsett and M.R. Trolove (2013)
New Zealand Plant Protection 66: 118-123
pdfBiology and survival of broom corn millet (Panicum miliaceum) seed
T.K. James, A. Rahman, C.R. McGill and P.D. Trivedi (2011)
New Zealand Plant Protection 64: 142-148

Copyright © 2012 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.