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Chilean needle grass becomes evident this month.

AgPest — Tue, 12 Dec 2017 20:30:54 +0000

Chilean needle grass will become evident in pastures in November-December. Keep an eye out for the reddish purple colour of the seed heads when they first emerge. Each seed has a 7 cm long awn (bristle-like tail). This grass is most likely to be found in pastures on north/west-facing drought-prone slopes but may be present in contaminated stock feed / hay. If you suspect that you have it, please contact your local council biosecurity people for identification and management advice immediately.

Vulpia hair grass, silvergrass

AgPest — Mon, 17 Jun 2013 03:37:13 +0000

Slender, stiff, short-lived grasses commonly growing in relatively dry places
Leaf blade flat or rolled, often very narrow, only 2 – 3 mm wide. Short membranous ligules less than 0.5 mm long
Lower surface of the leaf has no hairs and upper surface has very short hairs less than 0.5 mm long
Flowering stem, usually erect, bearing a one-sided flower head with spikelets 6 -12 mm long excluding the awns
Differences between V. bromoides and V. myuros in their glume length enable the two species to be separated. The glume is an outer husk protruding from the base of the spikelet
Lower glume of V. bromoides is 50 – 75% of the length of the upper glume
Lower glume of V. myuros is 15 – 40% of the length of the upper glume
In addition, V. bromoides seed heads protrude fully from the leaf sheath when mature while V. myuros mature seed heads are enclosed by the uppermost leaf sheath or only protrude a little from the sheath.

Ripgut brome, great brome, giant brome

AgPest — Sun, 16 Jun 2013 22:00:38 +0000

Nassella tussock, serrated tussock

AgPest — Thu, 13 Jun 2013 04:48:56 +0000

Chilean needle grass

AgPest — Wed, 12 Jun 2013 23:58:24 +0000

Barley grass

AgPestNZ — Tue, 04 Jun 2013 23:37:57 +0000

Downloadable files

http://agpest.co.nz/wp-content/uploads/2013/06/Barley-grass-taxonomy-distribution-and-identification.pdf

http://agpest.co.nz/wp-content/uploads/2013/06/Barley-grass-economic-significance.pdf

http://agpest.co.nz/wp-content/uploads/2013/06/Barley-grass-distribution-Influence-of-the-physical-environment.pdf

http://agpest.co.nz/wp-content/uploads/2013/06/Barley-grass-distribution-Influence-of-the-biological-environment.pdf

http://agpest.co.nz/wp-content/uploads/2013/06/Barley-Grass-Control-and-Evasion.pdf