Frequency Herbicide

The expected release of Frequency® Herbicide in time for use in 2020 wheat, barley and durum crops will give growers new chemistry to help manage problem broadleaf weeds with plenty of tank-mix options to help manage resistance issues.

Frequency will control some of the most hard-to-kill broadleaf weeds in every growing area and suppress the seed-set of wild oats in northern NSW and Queensland where Avena sterilis is dominant in the targeted population.

Efficacy 

Frequency is a contact herbicide which provides excellent control of a wide range of  broadleaf weeds, including hard to kill weeds such as fleabane.

Target weeds will show symptoms in 3–7 days and will usually die in 18–28 days.

BASF recommends applying Frequency with a tank-mix partner such as bromoxynil or MCPA, which can be ‘dialled up’ in the mix according to the size and spectrum of the target weeds.

Choosing tank-mix partners from different MOA groups can also help overcome resistance issues 

Mode of action

Frequency’s active ingredient, topramezone, has a Group H mode of action – it is an HPPD inhibitor (a “bleacher”).

Compatibility

Frequency is physically compatible with Ally*, Associate*, Agritone* 750 and LVE, Axial*, Bromicide* 200, bromoxynil, Flight* EC, MCPA (LVE), metsulfuron, Jaguar*, Paragon* Xtra, Sencor* 480 SC, Tigrex* and Topik* 240 EC.

Frequency is also physically compatible with Easy N* liquid fertiliser, but application of that mix may result in increased crop effect.

Trials have shown mixtures with picolinofen or diflufenican can cause foliar burn without affecting crop yield. 

Plantbacks

Frequency has very favourable minimum plantback periods. 

Check the label of any product mixed with Frequency® Herbicide to determine any plant back periods or restrictions on use.

6 weeks: wheat, barley, maize.

4 months: canola, cotton, chickpeas, faba beans, field peas, lentils, lupins, mungbeans, safflower, sorghum, sunflowers.

Suppression

Seed-set in wild oats in northern NSW and Queensland cropping zones where Avena sterilis is dominant in the targeted population

Application method

• Ground application only.

• Use an appropriate tank-mix partner at a rate suited to the weed spectrum & size.

• Add Hasten at 1%.

• Ensure good coverage with medium spray quality using 80–150 L/ha water.

• Do not apply to stressed crops.