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Solo Ultra

Group 2 & 1


Two modes of action for proven control of grasses and tough broadleaf weeds, with rotational freedom.

  • Built-in adjuvant, for ease of handling and reduced fill-up times
  • Reliable control of a wider spectrum of tough grasses and targeted broadleaf weeds
  • Extended application window on grassy weeds
  • Multiple modes of action for management of resistant weeds

Labels & SDS


Applicable On

Clearfield lentils


Labels & SDS

Additional Resources



Benefits of Solo Ultra

Solo Ultra herbicide is a co-pack of Solo ADV and Poast® Ultra herbicides that provides multiple modes of action for proven, reliable control of grasses and tough broadleaf weeds, including the management of resistant weeds, all with rotational freedom.

Product Info & Application Guide

Weed Management

Weed Class

List of Weeds

Broadleaf - cotyledon to 4 leaf (except where indicated)

Cleavers1 (1 to 4 whorls)
Cow cockle
Green smartweed2
Lamb’s quarters
Redroot pigweed
Round-leaved mallow1
Russian thistle
Volunteer canola
Wild buckwheat1
Wild mustard

Grasses - 1 to 6 true leaf stage up until early tillering

Barnyard grass
Fall panicum
Green foxtail
Japanese brome grass1
Persian darnel
Proso millet
Volunteer barley
Volunteer canary seed
Volunteer corn
Volunteer durum wheat
Volunteer spring wheat3
Volunteer tame oats
Wild oats2
Yellow foxtail


1 Suppression only.
2 Including Group 1-resistant biotypes and Group 2-resistant biotypes. Solo Ultra will not control biotypes that are multiple-resistant to both Group 1 and 2 herbicides.
3 All varieties including Clearfield.

Application Tips

Note: Solo ADV may contain a small amount of sediment, which is completely normal. Always perform a triple rinse of the jug when preparing the spray solution.


Rainfastness – 3 hours.

Apply in warm weather to weeds that are actively growing.
Avoid applying immediately before or after a frost or during unseasonably cold weather. Treat when weeds are actively growing.


Pre-harvest interval

65 days after application for Clearfield lentils.
80 days after application for soybeans.
105 days after application for Clearfield sunflowers. 


* Not on current label. This crop has been submitted to PMRA for approval and addition to the label.



Do not graze treated Clearfield lentils or soybeans or cut for hay within 20 days of application.
Do not graze treated Clearfield sunflower plants or cut for straw. 

When to Apply



Clearfield lentils

1 to 9 node

Clearfield sunflowers

2 to 8 leaf


cotyledon to 4 leaf


How Much to Apply

One case will treat 40 acres.

(a) Solo ADV herbicide

325 ml/ac (800 ml/ha)

(b) Poast Ultra herbicide

154 ml/ac (380 ml/ha)*


Water volume

Ground application only

40 L/ac (10 gal/ac)


*The rate of (b) can be topped up to provide additional control of quackgrass and suppression of foxtail barley.


Mixing order

  1. When applying Solo Ultra, always start with a clean sprayer. Refer to previously applied product labels for specific cleaning instructions.
  2. Fill the clean tank with 1/2 to 3/4 of the required amount of clean water and start agitation system. Agitation should be running during the entire mixing procedure.
  3. Add the correct amount of (a) Solo ADV and continue to agitate.
  4. Add the correct amount of (b) Poast Ultra while agitating the spray solution.
  5. Continue the agitation while filling the spray tank with the remaining amount of water.
  6. Maintain continuous and constant agitation throughout application until spraying is complete.

Follow Crops

3 months after application

Winter wheat4


1 year after application

Canary seed4Clearfield canola, non-Clearfield canola4, chickpeas, durum wheat4, field corn, field peas, flax4, lentils, soybeans, spring barley, spring wheat, sunflowers (incl. Clearfield sunflowers) and tame oats4


2 years after application

Mustard (condiment type only)4


4 If drought conditions are experienced between June 1 and September 1 in the year of application, delay planting of winter wheat, durum wheat, canary seed, tame oats, flax and canola (non-Clearfield) by an additional year. If drought is received between June 1 and September 1 in the year of application OR between June 1 and September 1 in the year following application, delay planting of mustard by an additional year.


Can I apply Pursuit® in Clearfield lentils and still comply with the process? Will I be eligible for BASF Ag Rewards?

  • Pursuit herbicide is not registered for use on Clearfield lentils.
  • Lentil growers who use any non registered herbicide - even in a tank mix - will not be in compliance with the Clearfield Commitment process and therefore will be ineligible for related rewards.
  • Registered herbicides are BASF products which include Solo®, Solo ADV, Solo Ultra, Odyssey®, Odyssey NXT, and Odyssey Ultra NXT.

What crop can I grow the year after using Solo® herbicides?

The following crops can be grown one year after using Solo herbicides: Canary seed, canola, chickpeas, durum wheat, field corn, field peas, flax, lentils (incl. Clearfield® lentils,) soybeans, Spring barley, Spring wheat, sunflowers (incl. Clearfield sunflower) and tame oats. 2 years after applications, Mustard (Condiment type only) can be grown.