Transcript Power Point to help you with Weeds Identification File

Weeds identification control
in sports turf
Tutor - Barry Dore
What is a ‘Weed’?

A weed is ‘_____________________’
What is a ‘Weed’?

A weed is ‘plant growing in wrong place’
Daisy -Bellis perennis
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Spoon shaped
leaves that forms
basal rosette
Flower 2cm - yellow
central disc, white
petals
Flowers March-Oct
Dandelion
-Taraxacum officinale
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Leaf - lobed,
narrow, forms
basal rosette
Deep tap root
One yellow flower
3-6cm
Slender speedwell
-Veronica filiformis
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Stalked leaves join
stem in pairs
Leaves are kidney
shaped
Flower - blue with
4 petals, 1cm
Yarrow - Achillea millifolium
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Narrow dark green
leaves 5-15cm long
Deep taproot,
rhizomes
Creamy/white
flowers
White Clover
-Trifolium repens
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Shamrock shaped
leaves (white mark)
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White flowers
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Creeping spread
Creeping Buttercup Ranunculus repens
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Alternate leaves on
stem divided into 3
lobes
Flowers have 5
yellow petals
Flowers from AprilJune
Common Chickweed Stellaria media
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Rounded stems
Bright green,
hairless leaves
White flowers
Five longer green
sepals under petals
Common mouse-ear Cerastium fontanum
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Stems/leaves
softly hairy
Leaves opposite
pairs along stem
Small white flowers
with 5 petals
Self Heal -Prunella vulgaris
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Vertical flower
stems
Leaves - oval,
pointed tips, round
bases
Flowers heads small purple
flowers
Common Nettle - Urtica dioica
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Stingy leaf
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Creeping rhizomes
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Upright growth
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Leaves in opposite
pairs
Ribwort Plantain
-Plantago lanceolata
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Leaves form basal
rosette
Lanceolate leaves
with 5 parallel
veins
Ridged flower stalk
Lesser trefoil
-Trifolium dubium
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Leaves - 3 leaflets
Small yellow 0.5cm
flowerheads
Up to 20 individual
flowers
Broad leaved dock
-Rumex obtusifolius
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Upright plant - up
to 1m
Round basal lobes
either side of stem
Lower leaves oblong/oval shaped
Procumbent Pearlwort Sagina procumbens
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Central whorl of
thin grass like
leaves
Four opening green
sepals with tiny
white flower
Flowers May-Sept
Annual Meadow grass
- Poa annua
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Folded leaf, pale
green, with boat
shaped tip
Tolerates close
mowing e.g. 5mm
Flowers all year
round
Activity 1 – Group
discussion
1.
2.
3.
Group A – Conditions that encourage
weeds
Group B – Methods of controlling
weeds
Group C – Reasons why you control
weeds
Reasons for controlling
weeds
1.
Unsightly on fine turf surfaces
2.
Affect playing surface
3.
4.
Weeds compete with turf for food,
water, light and space,
Prevents weeds from spreading
Spread of weeds
1.
2.
Some weeds produce seeds – spread
by wind, feet, machinery, animals
Some weeds creep by stolons and
rhizomes
Conditions that encourage
weeds
1.
Compaction
2.
Poor drainage
3.
Poor turf maintenance
4.
Bare grass swards
Weed Control
1.
2.
3.
Physical – physically dig out the
weed
Cultural – change environment weed
is growing in e.g. aeration to
discourage Greater Plantain
Chemical – e.g. selective herbicides
Cultural Weed control
1.
___________________________
2.
___________________________
3.
___________________________
4.
___________________________
Cultural Weed control
1.
Correct turf maintenance e.g. scarifying
2.
Install drainage – reduce wetness
3.
Reduce shade to encourage grass
4.
Aerate to relieve compaction
Activity 2
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Collect weeds and bring them back
for identification from the poster
Activity 3

Fill in 15 weed identification sheets
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Finish them off for next week
Self Assessment
1.
2.
Name 8 weeds found in turf
State 3 conditions that encourage weed
growth
3.
State 3 reasons for controlling weeds
4.
State 3 types weed control