Grass Weeds

Grass Weeds

Crowsfoot

Botanical Name: Eleusine indica
Family: Poaceae
Lifecycle: Annual
Seasons of Growth: Spring, Summer, Autumn
General Description: Crowsfoot is a hardy annual grass weed that will grow in all soil conditions and can survive in heavily compacted areas where couch grass may not. This low-growing grass is capable of setting seed even when closely mown. Though usually considered an annual, it may survive for more than a year in climates not subject to frost.

Key Distinguishing Feature: This grass produces enormous seed loads

Key Products for Control: Pre and Post emergent herbicides are best used to combat this grass.
Pre emergent : Oxafert pre emergent herbicide with fertiliser. 4kg/100m2 Post emergent : Tribute 15mL/100m2 - repeat application 3 times at 14 day intervals.

Paspalum

Botanical Name: Paspalum dilatatum
Family: Poaceae
Lifecycle: Evergreen
Seasons of Growth: All year round
General Description: A long-lived tufted grass growing up to 1.5 m tall. Its leaf blades are slightly folded at the base and are usually hairless. Its seed-heads are borne at the tips of the upright flowering stems these seed-heads have 2-11 branches (2.5-11 cm long) that are alternatively arranged along a main stalk each seed-head branch bears numerous small flower spikelets that are covered with hairs.

Key Distinguishing Feature: Branched seed-heads are borne at the tips of the upright flowering stems

Key Products for Control: Contact Lorn Turf for possible Paspalum control options.

Nut Grass

Botanical Name: Cyperus rotundus
Family: Cyperaceae
Lifecycle: Evergreen
Seasons of Growth: All year round
General Description: A long-lived grass-like plant usually growing 20-50 cm tall. It produces a network of creeping underground stems with small tubers (10-25 mm long). Its upright flowering stems are smooth and three-angled in cross-section its very narrow leaves. Its seed-heads have 3-8 branches of varying in length (up to 10 cm long) and are subtended by two to four green leafy bracts. These branches bear several elongated reddish-brown or purplish-brown flower spikelets.

Key Distinguishing Feature: Reddish-purple colour of the flower spikelets is the easiest way of differentiating nutgrass.

Key Products for Control: Halo-Force 1.3g/4Ltr/100m2 - apply with a non-ionic surfactant Wetter 600

Mullumbimby Couch

Botanical Name: Cyperus brevifolius
Family: Cyperaceae
Lifecycle: Evergreen
Seasons of Growth: All year round
General Description: A grass-like plant with long underground runners and upright flowering stems up to 40 cm tall. Its upright stems are three-angled in cross-section. Its bright green leaves (1-3 mm wide) are hairless and sheath the stem at the base. Its pale green seed-heads (6-7 mm long) have three or four green leafy bracts at the base and contain numerous small flower spikelets. Its 'seeds' are yellow to reddish-brown in colour.

Key Distinguishing Feature: Mullumbimby couch produces underground runners and has pale green coloured seed-heads

Key Products for Control: Halo-Force 1.3g/4Ltr/100m2 - apply with a non-ionic surfactant Wetter 600

Summer Grass

Botanical Name: Digitaria sanguinalis
Family: Poaceae
Lifecycle: Evergreen
Seasons of Growth: Annual
General Description: Summer Grass is a common weed in Australia’s lawns and gardens, as well as invading bushland in many regions. It is a very fast growing weed which sends out its shoots in all directions from it’s centre. It spreads through it’s stolons, and its stems can be brown or red in colour, with thin grey-green leaves, and fine spiky seed heads that shoot upwards. A prolific seeder, Summer Grass should be removed from lawns when first noticed.

Key Distinguishing Feature: Spikelets paired and all the way to the base of the 'fingers'. First glume is present. Sterile lemma is rough to touch on the nerves.

Key Products for Control: Contact Lorn Turf for possible Summer Grass control options.

Winter Grass

Botanical Name: Poa annua
Family: Poaceae
Lifecycle: Evergreen
Seasons of Growth: Autumn - Late Spring - Seeding Throughout Winter and Spring
General Description: It has a slightly creeping, fibrous, rootstock. The stem grows from 15–25 cm high. It is slightly flattened, due to being folded rather than rolled. The panicle is open and triangular shaped, 5 to 7.5 cm long. The spikelets are stalked, 1 to 2 cm long when flowering, and loosely arranged on delicate paired or spreading branches. The vivid green leaves are short and blunt at the tips. The leaves are smooth above and below, with finely serrated edges.

Key Distinguishing Feature: Tufty, soft, light green grass with masses of seeds occurring all over the weed

Key Products for Control: Poachek - 15mL/100m2 - Safe for turf varieties on label. These include Blue Couch, Common Couch, Bent, Buffalo and NZ Brown Top Lawns and Turf.