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Bentazone use under the spotlight

Users of herbicide bentazone are being urged collectively to take up the mantle of BASF’s water stewardship campaign or face losing this useful post-emergence herbicide altogether in the future.



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Bentazone is a post-emergence broad-leaved weed herbicide used in spring and winter field beans, broad beans, dwarf French beans, navy and runner beans, peas, linseed, narcissi and potatoes. It also has minor use approval extensions (EAMUs) for use on salad onions, leeks garlic, bulb onions, shallots, ground cover, ornamental plant production, hops, chives and herbs.

 

Bentazone is the most frequently detected pesticide in UK groundwater and it is also found in surface water. This is also the case in Europe. As there is now a link between EU legislation on pesticides and on water, authorisation for bentazone products in Europe could be restricted or lost altogether unless care is taken to protect water, says BASF.

 

The company, which markets bentazone in its herbicide Basagran, has made a number of stewardship recommendations.

 

Additional information is available here

 


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Bentazone stewardship

 

Responsible use of bentazone

High Risk Areas *

All other areas

Soils

Shallow, stony soils on chalk or other limestone

Do not Use

Avoid use

With shallow groundwater

Do not Use

Avoid use

With very low organic carbon

Do not Use

Avoid use

Other soils

OK to use

OK to use

Timing

Spring and Summer

OK after 1st April

OK to use

Autumn and Winter

Do not Use

Do not Use

Rate

All soils

Do not use >1000g a.i./ha

Avoid using >1000g a.i./ha

*Defined as Drinking Water Ground Water Safeguard Zones, Groundwater Source Protection Zones 1+2 (see Environment Agency website What’s In Your Backyard (WIYBY)).

Source: BASF

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