Written by Charlotte Cunningham from CPM Magazine
Potato growers may have to rethink their usual reliance on pre-emergence herbicides this year after a period of dry weather, according to the latest advice from Corteva. While planting has progressed well thanks to favourable conditions, the dry soils will have a negative impact on the efficacy of the pre-emergence weed killers typically applied to ridges shortly after planting. Craig Chisholm, Corteva Agriscience field technical manager, says leaving weeds unchecked can reduce yield, slow down harvesting machinery and increase the risk of blight. “Dry soils can crack or slip down the ridges, disrupting the all-important seal required for optimum efficacy from pre-emergence herbicides. As a result, rain or planned irrigation in the next few weeks will stimulate weed growth from the ridge surface and from depth. “Dry conditions in unirrigated fields and disruption to the herbicide ‘barrier’ means that the efficacy of pre-emergence chemistry will be compromised. This could well be a year when growers need to think about following up with a post-emergence spray.” He adds that Titus, containing the active ingredient rimsulfuron, is a valuable herbicide which targets key problem weeds and is an invaluable tool in a dry season when pre-emergence activity will be negatively affected. The…
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Potato growers may have to rethink their usual reliance on pre-emergence herbicides this year after a period of dry weather, according to the latest advice from Corteva. While planting has progressed well thanks to favourable conditions, the dry soils will have a negative impact on the efficacy of the pre-emergence weed killers typically applied to ridges shortly after planting. Craig Chisholm, Corteva Agriscience field technical manager, says leaving weeds unchecked can reduce yield, slow down harvesting machinery and increase the risk of blight. “Dry soils can crack or slip down the ridges, disrupting the all-important seal required for optimum efficacy from pre-emergence herbicides. As a result, rain or planned irrigation in the next few weeks will stimulate weed growth from the ridge surface and from depth. “Dry conditions in unirrigated fields and disruption to the herbicide ‘barrier’ means that the efficacy of pre-emergence chemistry will be compromised. This could well be a year when growers need to think about following up with a post-emergence spray.” He adds that Titus, containing the active ingredient rimsulfuron, is a valuable herbicide which targets key problem weeds and is an invaluable tool in a dry season when pre-emergence activity will be negatively affected. The…
The post Dry spell may alter potato herbicide strategies this spring appeared first on cpm magazine.
Continue reading on CPM website...
If you are enjoying what you read then why not considering subscribing here: http://www.cpm-magazine.co.uk/subscribe/