Practical Exam - Weeds Flashcards by Tim Lindsay

Q

Common Sowthistle - Scientific Name

A

Sonchus oleraceus

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Q

Common Sowthistle / Sonchus oleraceus - Family

A

Asteraceae

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Q

Common Sowthistle / Sonchus oleraceus - Distribution

A

Widespread
bottom 2/3 of Australia.
Along roads, cultivation gardens, roads

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Q

Common Sowthistle / Sonchus oleraceus - Eco subgroup

A

Annual crop weed

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Q

Flaxleaf Fleabane - Scientific Name

A

Conyza bonariensis

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Q

Flaxleaf Fleabane / Conyza bonariensis - Family

A

Asteraceae

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Q

Flaxleaf Fleabane / Conyza bonariensis - Reason for success in reduced tillage systems

A

Seeds grow best on soil surface

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Q

Flaxleaf Fleabane / Conyza bonariensis - Eco subgroup

A

Annual crop weed

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Q

Buchan Weed - Scientific name

A

Hirschfeldia incana

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Q

Buchan Weed / Hirschfeldia incana - Family

A

Brassicaceae

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Q

Buchan Weed / Hirschfeldia incana - Eco subgroup

A

Annual crop weed

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Q

Buchan Weed / Hirschfeldia incana - Eco subgroup

A

Annual crop weed

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Q

Bladder Ketmia - Scientific Name

A

Hibiscus trionum

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Q

Bladder Ketmia / Hibiscus trionum - Family

A

Malvaceae

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Q

Bladder Ketmia / Hibiscus trionum - Eco subgroup

A

Annual crop weed

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Q

Bladder Ketmia / Hibiscus trionum - Season of growth

A

Summer

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Q

Bladder Ketmia / Hibiscus trionum - Major weed of which crop that is in the same family?

A

Cotton

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Q

Wireweed / Polygonum aviculare - Family

A

Polygonaceae

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Q

Wireweed - Scientific name

A

Polygonum aviculare

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Q

Wireweed / Polygonum aviculare - Eco subgroup

A

Annual crop weed

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Q

Wireweed / Polygonum aviculare - Importance of this weed in Australian cropping

A

Weed of wheat
Widespread

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Q

Barnyard Grass - Scientific Name

A

Echinochloa crus-galli

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Q

Barnyard Grass / Echinochloa crus-galli - Palatability

A

Grass - very palatable

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Q

Barnyard Grass / Echinochloa crus-galli - season of growth

Study These Flashcards

A

Spring / Summer

Barnyard Grass / Echinochloa crus-galli - Family

Poaceae

Barnyard Grass / Echinochloa crus-galli - Eco Subgroup

Annual crop weed

Barnyard Grass / Echinochloa crus-galli - Weed importance

* Major weed of rice crop * weed of 35 other crops * many subspecies

Saffron Thistle - Scientific Name

Carthamus lanatus

Saffron Thistle / Carthamus lanatus - Family

Asteraceae

Saffron Thistle / Carthamus lanatus - Eco Subgroup

Annual pasture weed

Saffron Thistle / Carthamus lanatus - common in both pastures and crops. can this weed be grazed?

Yes, but only early in life when there are no spines

Saffron Thistle / Carthamus lanatus - How do the leaves differ to spear thistle?

No white hairs

Saffron Thistle / Carthamus lanatus - What colour are it's flowers?

Yellow

Bathurst Burr / Xanthium spinosum - Family

Asteraceae

Bathurst Burr / Xanthium spinosum - Eco Subgroup

Annual Pasture weed

Bathurst Burr - Scientific name

Xanthium spinosum

Bathurst Burr / Xanthium spinosum - Importance and Distribution

* Widespread, V common NSW * Abundant in pastures, cultivation, wasteland * Gets stuck in wool and impedes sheering

Spear Thistle - Scientific Name

Cirsium vulgare

Spear Thistle / Cirsium vulgare - Family

Asteraceae

Spear Thistle / Cirsium vulgare - Eco Subgroup

Biennial pasture weed

Spear Thistle / Cirsium vulgare - Why is this weed spread so easily?

* Many flowers, spread by wind * left in heavily grazed paddocks with no competition

Spear Thistle / Cirsium vulgare - Distribution and importance

* Very wide spread (all but NT) * Common in most crops

Horehound - Scientific Name

Marrubium vulgare

Horehound / Marrubium vulgare - Family

Lamiaceae

Horehound / Marrubium vulgare - Why isn't this grazed?

Toxic and hairy

Horehound / Marrubium vulgare - How is it spread?

Spread by burrs attached to lifestock

Horehound / Marrubium vulgare - Eco Subgroup

Perennial pasture weed

Serrated Tussock - Scientific Name

Nassella trichotoma

Serrated Tussock / Nassella trichotoma - Family

Poaceae

Serrated Tussock / Nassella trichotoma - Distinguishing features to other tussock grasses

* Remains green in winter * Surrations down stems * base of tiller, non-hairy white ligule

Serrated Tussock / Nassella trichotoma - Why is it a threat to grazing systems?

Takes over, but not enough nutrition to support lifestock. Highly invasive so easily can over take a pasture.

Serrated Tussock / Nassella trichotoma - How is it spread?

Wind

Serrated Tussock / Nassella trichotoma - Eco subgroup

Perennial pasture weed

Rushes - Scientific Name

Juncus spp.

Rushes / Juncus spp. - Family

Juncaceae

Rushes / Juncus spp. - How do rushes differ from grasses?

flowers not grouped into spiklets

Rushes / Juncus spp. - Reason for success in pastures

Unpalatable, grows in damp areas

Rushes / Juncus spp. - Eco Subgroup

Perennial pasture weed