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At last, after more than thirty years, herbicide active ingredients with new modes of action are in the pipeline. The growing problem of resistant weeds has driven more research effort, which is now showing signs of success.

Some new herbicide modes of action have been announced recently. So, new modes of action are there to be discovered, although it will be some years before the active ingredients concerned reach the market. Many hurdles remain,

More than 800,000 tonnes of wheat are being lost from UK harvests due to lower yields from crops infested with herbicide resistant blackgrass. This is estimated to cost farmers on average £400 million in higher costs and lower returns.

Modern chemical herbicides provide effective weed control. However, they are forbidden in organic food production and organic farmers have to use a variety of alternative methods to control weeds. Are any organic weed control methods effec...

The fundamental effect herbicides have on plant biochemistry is called the mode of action. After spraying, weeds are controlled by a cascade of biochemical events that generate various symptoms of abnormal growth and development.

Palmer amaranth (Amaranthus palmeri) is an aggressive broadleaved weed that has become a severe problem in crops such as cotton, maize and soybeans across the US. Twenty-five years ago, it was a minor weed of little concern, but today some...

Blackgrass (Alopecurus myosuroides) resistance has plagued cereal growing in Northern Europe since the early 1980s. In the UK it is reckoned that resistant populations exist on virtually all farms where any blackgrass herbicide has been us...