Herbicides
237
• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
How it Works
Prism is absorbed through the foliage and inhibits cell elongation.
Expected Result
Prism herbicide rapidly stops growth of susceptible species; typical symptoms usually appear within 5-7 days, but
may not be noticeable for 2 - 3 weeks after application, depending on growing conditions and weed susceptibility.
Warm, moist conditions following application promote the activity of Prism, while cool and/or dry conditions may
reduce or delay activity. Poor results may be expected if improper mixing, timing, coverage or when weeds are under
stress.
Restrictions
Rainfall
:
Rainfall within 2 - 4 hours of application may lessen degree of weed control.
Grazing Restrictions
:
Do not graze the treated crops or cut for hay; sufficient data is not available to support such
use.
Pre-harvest Interval
: 30
days. Make only one application per year.
Re-cropping
:
Barley, soybeans, white beans, red clover, sorghum, field corn, and potatoes may be planted 10 months
after application. Winter wheat mat be planted 4 months after application. For all other crops, a field bioassay is
recommended before planting.
Environmental Precautions
Prism herbicide is toxic to aquatic organisms and non-target terrestrial plants. Observe buffer zones specified on the
label.
Runoff
:
Avoid contamination of aquatic and sensitive terrestrial areas by using buffer zones.
Leaching
:
This product may leach in coarse textured soils or where the water table is shallow.
Toxicity
Ingestion: Practically non-toxic. Acute oral LD
50
(
rats) = > 5,000 mg/kg. Dermal toxicity. Slightly toxic.
Storage
Store in a cool, dry, well ventilated room.
Pulsar
Group 4
Formulation
Product
Company
Active ingredient
Formulation
Container size
Pulsar (PCP# 29450)
Syngenta
Fluroxypyr: 113.3 g/L Emulsifiable concentrate
2
x 9.825 L, 78.6 L
Dicamba: 86.9 g/L
Crops and Staging
Crop
Staging (zadoks growth stage)
Spring and durum wheat, barley
2 - 5
leaf crop stage
Weeds controlled
Pulsar applied at 246 mL/acre
cleavers
kochia
wild buckwheat (1 - 4 leaf)
Pulsar applied at 371 mL/acre
All of the above plus
lamb’s quarters (suppression)
redroot pigweed (suppression)
Russian thistle
stork’s bill (suppression)
volunteer flax
wild buckwheat (up to 9 leaf)
Prism (cont’d)