Common chickweed: - New England Grows

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Two
Common chickweed:
Flowers – white, small, at tips of branches and
in angles between pairs of branches
  Lifestyle
– One of the most common lawn
weeds but equally at home in landscape
beds and gardens
  Adapted to a wide variety of soils - fertile
  Distinguishing from other chickweeds by
ovate-pointed leaves
•  Most often a
perennial
Winter annual
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B.B. King
Pendulum 2G
Pendulum 3.3 EC
Pre-M 60DG
Corral
Snapshot TG
Gallery
Pendimethalin
Pendimethalin
Pendimethalin
Pendimethalin
Isoxaben + Trifluralin
Isoxaben
Not Ronstar
tolerant - Pink
Light green winter annual
Germinating – Sept/ Oct
Produces lots of seed
Distinguished by:
Boat shaped leaf
Honorable mention
Envoy – Best post control
Need to control with preemergence herbicides
Lifestyle:
  Widely adapted to site
conditions and cultural
practices.
  The most common and
widely distributed grassy
weed in the world.
Barricade 65WG
Prodiamine
Pendulum 2G,
Pendimethalin
Pendulum 3.3 EC Pendimethalin
Pre-M 60DG
Pendimethalin
Corral
Pendimethalin
Trifluralin
Trifluralin
Isoxaben + Trifluralin
Dimension
Dithiopyr
Ronstar G
Oxadiazon
Treflan 5G
Trifluralin EC
Snapshot TG
Lifestyle:
 One
Summer annual
Low growing, mat-producing
Distinguished by:
Latex exudate when stems broken
Opposite leaves
Heavy seed production
TODD MERVOSH
1/28/13
of the most difficult and
prevalent
 Warm temp. to germinate
 Found in un-irrigated bark mulch
 Common to parking lot tree
islands, crevices.
 Tolerates some shade but thrives
in harsh full-sun baked sites.
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Spurge
  Pendulum
  Barricade
  Snapshot
  Treflan
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#7 Yellow Nut Sedge
Perennial – reproducing by seed and rhizomes
  Grass like
  Triangular stems
  Leaves 3’s – pointing
outward in 3 directions
Spikelet's – contain seeds
Seed long-narrow, closely
arranged on secondary
branches
Many viable seed

Distinguish by:
  Leaves light green
  Umbrella-like cluster of yellow
- brownish branches at tip
of stem
Tubers - enlarged rhizomes ends
of rhizomes–yellow nutsedge,
Jerusalem artichoke, potatoes
 Postemergence
 
  SedgeHammer
 
– Halosulfuron
  1 packet per gallon
  Apply safely around all woody
ornamentals
  Do not spray over the top of
any ornamentals
  4-12” at 1-1.3 oz./ac + 1-2 qt
nonionic surfactant /100 gal.
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7
 
Postemergence
Basagran T/O (sodium
bentazon) = fair to good
control
Best = split app.
6-8” at 1.5 -2 pints/ac + 1 qt./
ac of crop oil [ ]
Same rate 7-10 days later
* Atrazine >4” + Basagran
Mature tubers unaffected by
Round-up
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 Postemergence
  Image 70 DG or Plateau –
Imazaqin
  0.5 oz. /ac
  Activity on wild onion/ wild
garlic
  Tolerant ornamentals: Holly
(several), Junipers (several),
liriope, Hosta.
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 Preemergence
  Pennant
Magnum: 2.0 lb.
ai./ac (2.2 kg/ha)
*  SedgeHammer: 0.05 lb.
ai./ac (0.06 kg/ha)
*  FreeHand: 3.5 lb. ai/ac
(3.9 kg/ha)
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Fatty Acid Killers
  Postemergence:
  Avenger
AG Burndown Herbicide
from oranges – citrus oil
  Non-selective grasses and broadleaves –
annual and perennial
  Strips away waxy cuticle of weeds =
dehydration, death
  Made
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Honorable Mention
Strawberry blite – Chenopodium capitatum

#4 Purslane – Portulaca oleracea
#4 Purslane – Portulaca oleracea
Distinguished by:
Reddish, fleshy stems
With watery juice
Thick green leaves –
no teeth
#4 Purslane – Portulaca oleracea
LOUIS VUITTON Handbag
Summer annual - seed
Thick succulent leaves and
stems – very drought resistant.
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#4 Purslane – Portulaca oleracea
Waxy cuticle =
inhibits uptake
Simple
perennial
– mainly
seed
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#2 Wild garlic (Allium vineale)
 Preemergence
  Pennant
Magnum: 2.0 lb.
ai/ac (2.2 kg/ha)
*  FreeHand: 3.5 lb. ai/ac
(3.9 kg/ha)
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Wild onion has no
offset bulblets.

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Postemergence:
  2,4-D
products when the plants are quite
small
  2,4-D + Gallery = residual
  2, 4-D - only non-crop, never as over-the-top
applications
  Late fall tilling effective = bulblets exposed
to killing temp.
  Plateau and Image 70 DG are registered
pre/post emergence controls.
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Bulbs are leaf tissues modified
for carbohydrate storage,
located below the soil
(ALS inhibitors) - 2 Families
Imidazolinone
Plateau
Imazapic
Sulfonylurea
SedgeHammer
Certainty
Halosulfuron-methyl
Sulfosulfluron
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#1 The thistles:
A. Prickly lettuce – Lactuca scariola
B. Annual Sowthistle - Sonchus asper
C. Scotch thistle -Onopordum acanthium
D. Canada Thistle - Cirsium arvense
The ever so prickly Mrs. Danvers … Alfred Hitchcock’s 1940 Rebecca
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Distinguished by:
Leaves alternate, stalkless,
clasping the stem
Leaves – elliptical to oblong
Narrower than scotch thistle
  rolific seeder
P
 Seed = dormant in soil 20 yrs.
 
 
i. 
ii. 
 
 
Spiny CT – yellow spines
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  Lontrel
or stinger - clorpyralid (most
effective on Asteraceae and leguminaceae
– (thistles, groundsel, horseweed, clovers)
(over the top of Pw, Ps, Sn, Sw, Cw,
Taxus) can be root absorbed – so no
drench plant
 No docks, lambsquarters, smartweed
•  Plateau – also registered
•  Well established – Tordon 22K
(picloram) – fall, fall and spring = best.
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2,4-D
2,4-D + Dicamba as a split-season
application
2,4-D at 2 quarts per acre = spring = 10-15
inches tall, in pre-bud to early bud stages
retreat in fall with Dicamba (2 quarts/A)
Lontrel in spring = 6-10”
* use stored nutrients, success = sound plan
implemented over several years
#1
Canada Thistle
Prickly lettuce
Spiny annual sowthistle
Scotch thistle
#2
Wild garlic
Wild onion
#3
Dandelion
Hairy galinsoga
#4
Purslane
#5
Curly dock
Sheep sorrel
#6
Lamb’s quarters
Strawberry blite
#7
Yellow nut sedge
#8
Prostrate spurge
#9
Annual blue grass
#10
Winter broadleaves
- Common chickweed
- Henbit
Large crabgrass
Mouse-eared chickweed
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