The residual and contact-acting herbicide, Flumioxazin, has a new and significant off-label approval for use in vining peas, carrots, parsnips and bulb onions.

The SOLA in vining peas was applied for by the Horticultural Development Council (HDC), which conducted the efficacy and selectivity work.

The SOLA for carrots and parsnips is mainly for the control of volunteer potatoes and will be a welcome option as there are no other post-emergence options in these crops. It can be applied at up to 100ml/ha post-emergence between BBCH 12-19 or from two true leaves up to nine true leaves. Growers need to take care about crop selectivity as there is a risk of crop spotting/damage. Harvest interval in carrots, parsnips and bulb onions is 28 days.

The SOLA for bulb onions is post-emergence of the crop from BBCH 13 to BBCH 45, or from the third leaf to 50 per cent of bulb diameter reached before bolting or 10 per cent leaves bent over. The dose rate of SumiMax, Digital and Guillotine is up to 100ml/ha. Selectivity relies on suitable crop leaf wax. Harvest interval in bulb onions is 42 days.

Sumitomo Chemical Company and Interfarm have provided the necessary residue data to support this submission. In vining peas the SOLA is for the control of volunteer potatoes, which are a problem in this crop as potato berries are toxic and of a similar size to peas and are difficult to remove at the factory. Their presence in vining pea samples may lead to crop rejection and so can have a significant economic impact.

Flumioxazin will also control a range of weeds including cleavers, charlock, chickweed, pansy, red dead-nettle, mayweed, groundsel and nightshades at 1-3 leaves in size and particularly when soils are moist.

It is formulated as a white, non-staining, easy-to-use suspension concentrate containing 300 gms ai/litre and is packed in a 500ml pack, available as SumiMax, Digital and Guillotine.

Topics