Introduction

147
Weed
Rate
(mL/ Acre)
Acres Treated
per 3 L Container
Barnyard grass, foxtail (green, yellow)* † , proso
millet, volunteer cereals (barley* † , canary seed,
corn, oat* † , wheat* † ), wild oat † 50** 60 Apply at 2 to 6 leaf stage.
†
Apply at the 2 to 4 leaf stage
Moderate to heavy infestations of the above
grasses, plus Persian darnel
75 40
Stage
when treated with the 60 acre
rate.
For best results in either case,
apply at the 2 to 3 leaf stage
Quackgrass (suppression only) 75 40 2 to 6 leaf stage when 3 to 6
Quackgrass (season long control) 150*** 20
inches (6 to 15 cm) tall. For best
results, apply at the 3 to 5 leaf
stage
* Apply to light infestations of these weeds only for the 60 acre per jug rate. The manufacturers do not provide
guidelines for weed densities under light infestations. When in doubt as to the level of weed infestation, use the higher
rate or contact the manufacturer.
** At this rate, clethodim should NOT be tank mixed with any other pesticide and should only be applied under the
following growing conditions: good crop stand, within the recommended leaf staging (2 to 3 leaf is optimum timing)
prior to tillering, light weed infestations, adequate moisture and fertility, absence of stress, and good growing
conditions.
*** Apply with 1 L of adjuvant per 100 L of spray solution (Amigo adjuvant with Centurion, Shadow RTM and Select;
X-ACT or Patron adjuvant with Arrow and Patron 240 EC).
Refer to the product labels for complete mixing instructions. A general guide to mixing can be found on page 8.
Weed Control
Application Information:
• Water Volume:
º Ground: 20 to 40 L per acre. Use 40 L per acre under dense weed infestations or dense crop canopies.
º Aerial: Minimum of 11.3 L per acre.
• Nozzles and Pressure: Use 40 psi (275 kPa) when using conventional 80 o flat fan nozzles tilted forward at a 45 o angle.
Low drift nozzles may require higher pressures for proper performance. Use nozzles and pressure designed to deliver
proper coverage with ASABE medium droplets or larger.
How it Works:
Refer to Table 9 on page 48.
Effects of Growing Conditions:
Clethodim will be less effective when plants are stressed by lack of moisture, excessive moisture, low temperature and/or
very low relative humidity. Re-growth of tillers may occur if application is made under any of the above stress conditions.
Clethodim activity is reduced by levels of bicarbonate ions in spray water equal to or greater than 500 ppm. The addition of
ammonium sulphate at 1.6 L per acre (480 g/L liquid) or 0.8 kg per acre (99% dry), or the addition of 28-0-0 liquid fertilizer at
0.5 L per acre to the tank prior to the addition of clethodim has been shown to restore control.
Tank Mixes:
Clethodim may be tank mixed with other pesticides at the 75 to 150 mL per acre rates. Tank mix partners applied at all label
rates and include recommended adjuvants unless otherwise noted.
Add the recommended amount of adjuvant with all tank mixes unless otherwise indicated.
Herbicides:
• In flax (not including solin):
º Bromoxynil/MCPA ester (label rates) Δ
º Curtail M †
º MCPA ester (rates for flax)
º Lontrel at 0.23 to 0.34 L per acre †