Introduction

272
Crops and Staging:
Apply to the following established crops between October 1 and freeze-up or very early spring*. Temperatures should
be above freezing at time of application but should not exceed 12°C after application or a reduction in control may be
observed. Applications are more effective if followed by a rain. Contact manufacture for specific staging and application
guidelines prior to application.
Established alfalfa, bird’s-foot trefoil, and established pastures**.
* Early spring application for seed alfalfa only.
** Severe stand thinning may occur to pastures consisting primarily of crested wheatgrass, meadow fescue and
timothy.
• Some thinning (10 to 15%) may occur with tall fescue and creeping red fescue.
Weeds, Rates and Staging:
Apply in late fall or very early spring (seed alfalfa only) prior to the emergence of weeds.
Established grass or grass/legume pastures for control of foxtail barley:
• Brown, dark brown or gray wooded soils:
º Kerb SC: 0.45 L per acre.
• Black soils:
º Kerb 50WP: 0.45 kg per acre.
º Kerb SC: 0.56 L per acre.
Established Alfalfa † and bird’s foot trefoil † :
Weed
Rate (kg per acre)
Kerb WP
Kerb SC
Annual grasses, volunteer cereals, wild oat 0.71 kg † 0.89 L †
Quackgrass, orchardgrass, timothy, chickweed 0.91 to 1.32* kg 1.13 to 1.62* L
Dodder (fall application only) 1.3 kg 1.62 L
º Note that complete control may not be achieved.
* Maximum 0.91 kg per acre with spring application. Low temperatures and adequate moisture following
application are needed for efficacy.
†
Including fall application on spring seeded crops.
Caution: DO NOT use on soils with more than 6% organic matter. DO NOT apply to soils prone to flooding. DO NOT apply to
pastures that contain high proportions of timothy, crested wheat grass or meadow fescue. Consult the manufacturer for other
forage grass species sensitivities to Kerb.
Application Information:
• Water Volume: 120 to 200 L per acre.
• Nozzles and Pressures: Maximum 30 to 40 psi (200 to 275 kPa) with conventional flat fan nozzles. Low drift nozzles
may require higher pressures for proper performance. Use nozzles and pressure designed to deliver thorough, even
coverage with ASABE medium droplets.
How it Works:
Refer to Table 9 on page 48.
Effects of Growing Conditions:
Dry soil conditions at time of weed emergence may result in reduced control. Approximately 3 inches of total precipitation
is required for adequate activation. Best results when soil temperatures are low but above freezing.
Tank Mixes:
None Registered