New Zealand Plant Protection 69 (2016): 252-257
The first cases of weeds developing resistance to glyphosate within New Zealand have recently been reported and investigated. Both perennial ryegrass (Lolium perenne) and Italian ryegrass (Lolium multiflorum) populations have become resistant to glyphosate in several Marlborough vineyards due to many years of weed control using mainly just glyphosate. Glyphosate is currently being used in many situations throughout New Zealand that could easily lead to further resistance developing, such as in other perennial fruit crops, on roadsides, railways, amenity areas, waste areas, fence lines and headlands of crops. Following wide consultation as part of a Sustainable Farming Fund project, strategies for resistance management in three systems (vineyard and orchards, amenity and waste areas, and crops and pastures) are suggested. Adoption of these strategies will allow glyphosate to continue as a useful herbicide in New Zealand.
Keywords: glyphosate, herbicide resistance, resistance strategy, vineyard.
|Confirmation of glyphosate resistance in two species of ryegrass from New Zealand vineyards|
H. Ghanizadeh, K.C. Harrington, T.K. James and D.J. Woolley (2013)
New Zealand Plant Protection 66: 89-93
|A survey of weed control practices in New Zealand pipfruit orchards|
K.C. Harrington, S.B. Berry and R.E.H. Sims (1992)
Proceedings of the NZ Plant Protection Conference 45: 285-288
Copyright © 2016 New Zealand Plant Protection Society (Inc.).