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Agriculture AGRO211 > Practical Exam - Weeds > Flashcards

Practical Exam - Weeds Flashcards

1
Q

Common Sowthistle - Scientific Name

A

Sonchus oleraceus

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2
Q

Common Sowthistle / Sonchus oleraceus - Family

A

Asteraceae

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3
Q

Common Sowthistle / Sonchus oleraceus - Distribution

A
  • Widespread
  • bottom 2/3 of Australia.
  • Along roads, cultivation gardens, roads
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4
Q

Common Sowthistle / Sonchus oleraceus - Eco subgroup

A

Annual crop weed

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5
Q

Flaxleaf Fleabane - Scientific Name

A

Conyza bonariensis

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6
Q

Flaxleaf Fleabane / Conyza bonariensis - Family

A

Asteraceae

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7
Q

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

A

Seeds grow best on soil surface

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8
Q

Flaxleaf Fleabane / Conyza bonariensis - Eco subgroup

A

Annual crop weed

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9
Q

Buchan Weed - Scientific name

A

Hirschfeldia incana

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10
Q

Buchan Weed / Hirschfeldia incana - Family

A

Brassicaceae

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11
Q

Buchan Weed / Hirschfeldia incana - Eco subgroup

A

Annual crop weed

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12
Q

Buchan Weed / Hirschfeldia incana - Eco subgroup

A

Annual crop weed

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13
Q

Bladder Ketmia - Scientific Name

A

Hibiscus trionum

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14
Q

Bladder Ketmia / Hibiscus trionum - Family

A

Malvaceae

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15
Q

Bladder Ketmia / Hibiscus trionum - Eco subgroup

A

Annual crop weed

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16
Q

Bladder Ketmia / Hibiscus trionum - Season of growth

A

Summer

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17
Q

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

A

Cotton

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18
Q

Wireweed / Polygonum aviculare - Family

A

Polygonaceae

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19
Q

Wireweed - Scientific name

A

Polygonum aviculare

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20
Q

Wireweed / Polygonum aviculare - Eco subgroup

A

Annual crop weed

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21
Q

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

A
  • Weed of wheat
  • Widespread
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22
Q

Barnyard Grass - Scientific Name

A

Echinochloa crus-galli

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23
Q

Barnyard Grass / Echinochloa crus-galli - Palatability

A

Grass - very palatable

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24
Q

Barnyard Grass / Echinochloa crus-galli - season of growth

A

Spring / Summer

25
Q

Barnyard Grass / Echinochloa crus-galli - Family

A

Poaceae

26
Q

Barnyard Grass / Echinochloa crus-galli - Eco Subgroup

A

Annual crop weed

27
Q

Barnyard Grass / Echinochloa crus-galli - Weed importance

A
  • Major weed of rice crop
  • weed of 35 other crops
  • many subspecies
28
Q

Saffron Thistle - Scientific Name

A

Carthamus lanatus

29
Q

Saffron Thistle / Carthamus lanatus - Family

A

Asteraceae

30
Q

Saffron Thistle / Carthamus lanatus - Eco Subgroup

A

Annual pasture weed

31
Q

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

A

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

32
Q

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

A

No white hairs

33
Q

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

A

Yellow

34
Q

Bathurst Burr / Xanthium spinosum - Family

A

Asteraceae

35
Q

Bathurst Burr / Xanthium spinosum - Eco Subgroup

A

Annual Pasture weed

36
Q

Bathurst Burr - Scientific name

A

Xanthium spinosum

37
Q

Bathurst Burr / Xanthium spinosum - Importance and Distribution

A
  • Widespread, V common NSW
  • Abundant in pastures, cultivation, wasteland
  • Gets stuck in wool and impedes sheering
38
Q

Spear Thistle - Scientific Name

A

Cirsium vulgare

39
Q

Spear Thistle / Cirsium vulgare - Family

A

Asteraceae

40
Q

Spear Thistle / Cirsium vulgare - Eco Subgroup

A

Biennial pasture weed

41
Q

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

A
  • Many flowers, spread by wind
  • left in heavily grazed paddocks with no competition
42
Q

Spear Thistle / Cirsium vulgare - Distribution and importance

A
  • Very wide spread (all but NT)
  • Common in most crops
43
Q

Horehound - Scientific Name

A

Marrubium vulgare

44
Q

Horehound / Marrubium vulgare - Family

A

Lamiaceae

45
Q

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

A

Toxic and hairy

46
Q

Horehound / Marrubium vulgare - How is it spread?

A

Spread by burrs attached to lifestock

47
Q

Horehound / Marrubium vulgare - Eco Subgroup

A

Perennial pasture weed

48
Q

Serrated Tussock - Scientific Name

A

Nassella trichotoma

49
Q

Serrated Tussock / Nassella trichotoma - Family

A

Poaceae

50
Q

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

A
  • Remains green in winter
  • Surrations down stems
  • base of tiller, non-hairy white ligule
51
Q

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

A

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

52
Q

Serrated Tussock / Nassella trichotoma - How is it spread?

A

Wind

53
Q

Serrated Tussock / Nassella trichotoma - Eco subgroup

A

Perennial pasture weed

54
Q

Rushes - Scientific Name

A

Juncus spp.

55
Q

Rushes / Juncus spp. - Family

A

Juncaceae

56
Q

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

A

flowers not grouped into spiklets

57
Q

Rushes / Juncus spp. - Reason for success in pastures

A

Unpalatable, grows in damp areas

58
Q

Rushes / Juncus spp. - Eco Subgroup

A

Perennial pasture weed

Agriculture AGRO211 (4 decks)

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