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Active materials

Diqua is a herbicide for weed control and desiccation in a range of crops.

A soluble concentrate containing 200g/litre (16.7% w/w) Diquat as the dibromide salt.

Environmental Protection
AVOID DRIFT on to non-target plants.
HARMFUL TO LIVESTOCK. Keep all livestock out of treated areas for at least 24 hours after treatment.
Do not use straw (or haulm) from treated crops as animal feed (or bedding) for at least four days after last application.
DO NOT CONTAMINATE WATER with the product or its container. Do not clean application equipment near surface water. Avoid contamination via drains from farmyards and roads.
Storage and Disposal
KEEP IN ORIGINAL CONTAINER, tightly closed, in a safe place.
WASH OUT CONTAINER THOROUGHLY by using an integrated pressure rinsing device or manually rinsing three times. Add washings to sprayer at time of filling and dispose of safely.
DO NOT RE-USE CONTAINER for any purpose.

Do not treat crops that are or have been under stress from any cause, including poor soil or cultural conditions, adverse climatic conditions, waterlogging or drought, pest or disease attack, nutrient deficiency, or any other cause.
Consult processors before treating crops of peas or potatoes which are destined for processing.
This product must not be applied through ultra low volume equipment (ULVA) or mist blower equipment.
Use of an alcohol ethoxylate adjuvant wetter
Where a wetter is advised, use an alcohol ethoxylate adjuvant in accordance with the manufacturer’s instructions.
DO NOT use an alcohol ethoxylate adjuvant for desiccation of potato haulm or peas.
Diquat belongs to the class of herbicide known as the bipyridyls. Strains of annual meadow grass and American willow herb resistant to paraquat have been found in some hop yards/gardens and also top fruit and soft fruit gardens. Where paraquat resistant strains are present DIQUA may not give full control of these weeds.

DIQUA is a foliar applied herbicide and crop desiccant, for use in a wide range of crops.
Important: This information is approved as part of the Product Label. All instructions within this section must be read carefully in order to obtain safe and successful use of this product.
DIQUA may be applied pre-harvest to crops of potatoes, oilseed rape, combining peas (to be harvested dry), field beans (for pigeon and stock feed only), linseed, barley and oats (for animal feed only) to speed up harvesting by removal of green weeds and desiccation of the crop.
Diqua does not accelerate ripening; crops should already be mature at time of application. If it is used on crops which are not fully ripe, seeds with low specific weight and poor germination (in the case of seed crops) will be produced. DIQUA acts rapidly on the green parts of plants (it is rainfast within 15 minutes of spraying) and desiccates crops and weeds within a few days. DIQUA is inactivated on contact with the soil and so will not affect subsequent crops. Its use does not require specialist application equipment.
Method of application
Apply by means of a conventional hydraulic nozzle tractor-mounted or trailed sprayer. Ensure that the sprayer is correctly calibrated to apply the recommended water volume and spray quality, and that the boom height and nozzles are adjusted to give even coverage of the crop.
Water Volume
Apply in 200-500 litres of water per hectare, as listed under each crop. The activity of DIQUA is dependent on complete cover of the crop and weeds. Use the higher recommended water rates if the crop or weeds are dense and ensure the sprayer boom is set high enough. When tank mixing DIQUA with other approved pesticides, follow the mixing instructions of the partner products in addition to those for DIQUA.
Spray Quality
Apply as a MEDIUM spray using a pressure of 2-3 bar. Where higher spray volumes are required, use twin outlet nozzles or twin spray booms. Do not apply through mist blowers. Avoid spray drift. Do not spray in windy conditions. 

DIQUA can be used as a desiccant on potatoes (seed and ware), combining pea, field bean, linseed, oilseedrape, barley and oats (for animal feed only).
DIQUA can be used as a herbicide on all outdoor edible and non-edible crops, and inter-row crops.
Rate of application and timing
DIQUA should be applied at the rates and timings specified below


Invert and shake the container well before opening. Use only clean water. Put nine tenths of the required volume of water into the spray tank and commence agitation. Pour in the required amount of DIQUA followed by the remainder of the water. Continue agitation whilst filling and during spraying. Do not leave sprayer standing with mixture in it. Always ensure that the sprayer is in good working order and calibrated accurately to the manufacturer’s recommendations.

Tank Mixes
DIQUA can be tank mixed with a range of other products. If using tank mixes, unless directed otherwise the preferred order of addition of products to the tank is: water dispersible granules, wettable powders, suspension concentrates (flowables), emulsifiable concentrates, solution concentrates. Each product must be added to a half-full sprayer and be fully dispersed before the addition of the next product.
Tank mixes must only be applied within the label recommendations of every product in the mix.
DIQUA is compatible with the following products: Shirlan.

All goods supplied by us are of high grade and we believe them to be suitable but, as we cannot exercise control over their storage, handling, mixing or use or the weather conditions before, during or after application, which may affect the performance of the goods, all conditions and warranties, statutory or otherwise, as to the quality or fitness for any purpose of our goods are excluded, and no responsibility will be accepted by us or re-sellers for any failure in performance, damage or injury whatsoever arising from their storage, handling, application or use. These conditions cannot be varied by our staff or agents whether or not they supervise or assist in the use of such goods.

Registered for culturesRate
Potatoes4 l
Peas3 l
Beans3 l
Winter flax3 l
Spring flax3 l
Winter rape3 l
Spring rape3 l
Spring barley4 l
Winter barley4 l
Spring oats4 l
Winter oats4 l