Broad-leaved weeds biology & control are undesirable as they utilise resources (light, nutrients, water) away from the farmed crop and reduce crop yields.
Broad-leaved weeds
What are broad-leaved weeds?
Plant species fall into two groups; the true flowering plants comprise the dicotyledons and the monocotyledons (grasses). Dicotyledons have two seed leaves and the monocotyledons have one seed leaf (monocotyledons). Whether dicotyledons or monocotyledons, these plant species are indigenous, being influenced by location, soil type and rainfall/wetness. Plant species that pose challenges to agricultural production are termed weeds and sometimes referred to as being plants in the wrong or unwanted place.
Biology
Land used for cereal crops can become infested with annual and perennial weeds. Annual species (those that complete their life cycle within a year) are more typical in arable crops. To minimise competition between weeds and crop it is advisable to treat broad-leaved weeds in cereal crops before they compete significantly with the crop. Programmes begin in autumn, with additional treatments made in the spring, around GS 30-32.
How can I identify broad-leaved weeds?
Broad-leaved weeds are those plants with two seed leaves (dicotyledons) that appear through the ground after germination before the true leaves form.
Why are broad-leaved weeds a problem?
Weeds are undesirable as they utilise resources (light, nutrients, water) away from the farmed crop and reduce crop yields. Some species, such as volunteer potatoes can act as a source of potato blight to neighbouring crops.
How do I control broad-leaved weeds?
Corteva agriscience has a range of products containing Arylex™, pyroxsulam and florasulam that can be used in cereal crops for the control of weeds. The introduction of pyroxsulam, found in Broadway® Star and Memphis® has created a whole new concept in weed control. Previously, most herbicides have focused on either effectively controlling grassweeds or broad-leaved weeds – our pyroxsulam products control both weed types – that’s ‘cross spectrum’ weed control.
A key benefit of Spitfire® is its robustness of control of major weeds from early autumn to late spring. As the spring progresses even more options become available for broad-leaved weed control in cereals.
Arylex containing products (Zypar® and Pixxaro®) control the most economically damaging weeds and are suitable for use in a range of cereal crops.
Starane® XL and GF-184 can all be applied once the crop has reached GS13. Best results are achieved from applications made from late March onwards.
Starane® Hi-Load can be used from late April onwards, when temperatures are warmer and the risk of night frosts has diminished.
Product choice
Zypar Herbicide
Zypar® is an innovative herbicide for the control of broad-leaved weeds in winter cereals and spring cereals.
Pixxaro EC Herbicide
Based on the innovative active ingredients Arylex™ active and fluroxypyr, Pixxaro® EC is suitable for the control of broad-leaved weeds in winter and spring cereals.
Starane XL Herbicide
Starane® XL delivers consistent control time after time in the fight against cleavers and many broad-leaved weeds in cereals.
Broadway Star Herbicide
Broadway® Star delivers an outstanding performance in winter wheat against yield robbing grassweeds, plus the bonus of controlling an extensive range of broad-leaved weeds.
Memphis Herbicide
Memphis® is a post-emergence herbicide for grass weed and broad-leaved weed control in winter cereals.
Starane Hi-Load Herbicide
Starane® Hi-Load offers consistent and reliable weed control year after year.
Spitfire Herbicide
Spitfire® helps combat a wide range of broad-leaved weeds in cereal crops, for use in both autumn and spring.
Broadway Ultra Herbicide
Broadway® Ultra is unique combination of pyroxsulam and mesosulfuron, providing post-emergence broad spectrum grass and broad-leaved weed control in winter wheat and winter triticale.