Herbicides
117
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
Environmental Precautions
Curtail M contains a petroleum distillate that is moderately to highly toxic to aquatic organisms. Avoid contamination
of aquatic systems during application and cleanup. Observe buffer zones specified under Directions For Use on the
label.
Leaching
:
This product can leach under coarse soils and elevated water tables.
Toxicity
Clopyralid:
Low acute mammalian toxicity. Acute oral LD
50
(
rat) = >2,000 mg/kg. Extremely toxic to fish.
MCPA:
Moderate acute toxicity. Acute oral LD
50
(
rats) = technical 700 - 880 mg/kg. May cause burns upon contact with skin
and eyes, and it can be absorbed through the skin.
Storage
Store in cool (above 5°C) dry area.
Deploy/Nimble
Group 2
Formulation
Product
Company
Active ingredient
Formulation
Container size
Deploy (PCP# 29149
Arysta LifeScience Thifensulfuron methyl: 50% +
tribenuron methyl 25%
Dry flowable
480
grams
Nimble (PCP# 29467)
Cheminova
Water dispersible granules 320 grams
Crop and Staging
Apply when the cereals are in the two-leaf to flag leaf (shot blade) stage of growth (prior to head emergence). For
seedling or established grasses, apply when weeds are young and actively growing; no growth stage mentioned for
grasses.
Cereals
Seedling or established grasses for forages or seed production
Barley
Oats
Wheat (spring, winter and
durum)
Meadow brome, smooth brome, creeping red fescue, tall fescue, orchard grass, crested wheatgrass,
intermediate wheatgrass, pubescent wheatgrass, tall wheatgrass, slender wheatgrass, streambank
wheatgrass, northern wheatgrass, western wheatgrass.
Established grasses for forage or seed production: Kentucky bluegrass.
Weeds and Staging
Apply to emerged, young, actively growing weeds that are less than 10 cm tall or across.
Weeds controlled
ball mustard
chickweed
common groundsel
corn spurry
cow cockle
flixweed
green smartweed
hemp-nettle
kochia
lady’s-thumb
lamb’s-quarters
narrow-leaved hawk’s-beard
redroot pigweed
Russian thistle
shepherd’s-purse
stinkweed
tartary buckwheat
volunteer canola (excluding CLEARFIELD)
volunteer sunflower
wild buckwheat (cotyledon -
3
leaf)
wild mustard
Weeds suppressed
Canada thistle (< 15 cm tall)
cleavers (1 - 3 whorl)
round-leaved mallow (2 - 6 leaf)
scentless chamomile
sow-thistle (< 15 cm tall)
stork’s-bill (2 - 6 leaf)
toadflax (< 15 cm tall)
Rate
Deploy 75 or Nimble 75 DF: 8 g/acre plus non-ionic surfactant (Agral 90, Agsurf, Citowett Plus, or Nufarm
Enhance) at 0.2% v/v or 0.2 L per 100 L of spray solution.
Caution
:
Apply within 24 hours of mixing.
Curtail M (cont’d)