Key Points
- In New Zealand the common name ‘hairgrass’ combines three individual Vulpia species (Vulpia bromoides, V. myuros and V. Megalura).
- The individual species are very difficult to identify, with the seed head being the easiest feature to separate the species.
- Typically germination follows a 2-3 month dormancy which breaks when monthly rainfall exceeds evaporation.
- Germination occurs both in light and dark conditions; however germination is more rapid and uniform in the light.
- Seedling emergence from the relatively shallow depth of 5cm is considerably less than 0-1 cm.
- An integrated approach including cultivation, chemical and crop rotation is required for sustained control of Vulpia spp.
- The relationship between burial through cultivation on seed dormancy and viability is not clear and will be the focus of future FAR funded research.
- Chemical control can be difficult and will continue to be a focus of FAR trial work.