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Conviso One is a post-emergence broad-spectrum herbicide containing foramsulfuron and thiencarbazone-methyl, two highly active ALS herbicides. It is for use exclusively in ALS-tolerant sugar beet varieties known as Conviso Smart.

Conviso One has a single application rate of 1L/ha and should be applied at the 2-4 true leaf stage of the target weeds. Although able to control a wide range of weeds, fat-hen is likely to be the marker weed in most situations, so application should be timed accordingly. In crop terms, this is likely to be around growth stage 14-18, four to eight true leaves.

It should not be mixed with other herbicides but can be applied in sequence with other non-ALS containing herbicides where non-controlled weeds, such as resistant grassweeds or volunteer potatoes are present. Herbicide uptake is via both leaves and roots with its soil movement influenced by soil moisture status.

Conviso One has been developed using classic breeding techniques such as those utilised in the introduction of rhizomania resistance and nematode tolerance.

All plants need to form specific amino acids to grow. Conviso One works by binding with the ALS enzyme preventing the substrate from attaching to it. Unable to produce essential amino acids, the target weed dies.  Conviso Smart varieties contain a naturally occurring tolerant enzyme that prevents the Conviso One herbicide from binding to it meaning it can continue producing essential amino acids and grow naturally.

More than 1.5 billion cells were screened to locate this naturally occurring tolerance. It formed the basis for the Conviso Smart system.

The recommended timing of application is when the weeds are at the two to four true leaf stage, but it can control weeds up to six true leaves depending on species. In most situations this will coincide with an application during crop growth stage 14 to 18, the four to eight true leaf stage.

In practice weeds rarely emerge at the same time or grow at the same rate so application timing should be determined by the growth of the dominant weed species for the field situation.  In most instances this will be fat-hen as it, and other tall weeds, have the capacity to inflict serious yield penalties on sugar beet if left uncontrolled.  Conviso One should be applied before fat-hen reaches four true leaves.

CROP SPECIFIC INFORMATION
Conviso One can be used on any Conviso
Smart sugar beet or fodder beet hybrid. For a list of current Conviso Smart beet hybrids, contact Bayer Crop Science.
Apply Conviso One via a horizontal boom sprayer in 150–300 L/ha water as a FINE to MEDIUM spray (BCPC category). Use application techniques which ensure good weed coverage and crop penetration.
Ensure that spray swaths do not overlap. For optimum results, apply Conviso One during warm weather, when the soil is moist and the weeds actively growing. Dry conditions resulting in moisture stress may reduce effectiveness. Conviso One can be used on any soil type.
Apply using a pressure of 2.5–3.0 bar and a spray quality of FINE TO MEDIUM (BCPC category).
Apply at a dose rate of 1 L/ha, postemergence from the four-leaf stage of the crop (GS 14) up to and including the eight-leaf stage of the crop (GS 18).

MIXING
Add the recommended quantity of Conviso
One to the spray tank half-filled with the required quantity of clean water. Add the remainder of the water with the sprayer agitation system in operation. Maintain agitation during mixing and loading and until spraying is complete. Do not leave the sprayer standing with chemical in it. Do not tank mix Conviso One with any other herbicide.