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New Zealand Plant Protection 66 (2013): 105-109

Survey of ripgut brome and other species on Canterbury hill/high country roadsides

K.N.Tozer,, R.H. Bryant, C.A. Cameron and G.R. Edwards

ABSTRACT

Ripgut brome is found in high country Canterbury pastures but little is known of its prevalence and distribution. In a 1020 km roadside vegetation survey, all exotic and native plant species within a 5 m 5 m quadrat were identified at 10 km intervals. Ripgut brome (Bromus diandrus) was present in 11% of the 165 quadrats, which ranged from 40 to 950 m above sea level, occurring most frequently below 200 m. It was least often detected adjacent to intensive pastures (only 2% of quadrats). Agrostis capillaries (browntop) was present in 63% of quadrats, followed by Trifolium repens (white clover, 59%) and Dactylis glomerata (cocksfoot, 53%). The lowest number of exotic species was detected adjacent to intensive pasture (5.8) and highest adjacent to forestry (8.6 species). Highest numbers of native species were present adjacent to semi-improved pastures (1.7) and above 500 m (2.3 species). Species prevalent on roadsides were commonly grazed in hill/high country pastures rather than being pasture weeds.

Keywords: annual grass, weeds, botanical survey, biodiversity.

Related articles
pdfRipgut brome (Bromus diandrus) distribution in relation to topography and management on seven high country properties in the South Island
K.N. Tozer, A.J. Marshall, J.R. Sedcole and G.R. Edwards (2007)
New Zealand Plant Protection 60: 168-173

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