Allowing broad-leaved weeds such asvolunteer beans to thrive can ruin the final stage in the black-grass fight,warns Dow AgroSciences cereal herbicide specialist Stuart Jackson.
Mr Jackson says: The autumn focus is ongrass weed control in cereals, but if these fast growing broad-leaved weeds arenot controlled early, they will shade target grass weeds from post-emergencesprays – leading to unsatisfactory control.
The answer is to take volunteers out as soonas possible to give black-grass sprays a clear run and avoid crop loss. Thetraditional product has been mecoprop (CMPP) but this is no longer available.However, Dow AgroSciences SPITFIRE will more than fill the gap in winter wheatand winter barley.
Volunteer beans can grow away quickly andprovide a significant challenge to effective blackgrass control, says MrJackson. SPITFIRE, a formulation of florasulam and fluroxypyr developed forthe UK is ideal for removing volunteer beans as well as a range of otherbroad-leaved weeds and volunteer rape, giving fast and effective control.
SPITFIRE offers flexibility in spray timings- ideal when weather disrupts operations. Application is approved from autumnright through to late spring and it can be followed by more florasulam-basedproducts to complete broad-leaved weed control in the spring provided the totaldose does not exceed 7.5g/ha over the season.
For added convenience SPITFIRE has a widerange of tank mix compatibilities including with autumn graminicides, autumnresiduals and BYDV insecticides. It is rainfast in an hour and works in coolautumn conditions.
For best results, apply to actively growingweeds, advises Mr Jackson. Apply SPITFIRE at 0.5l/ha for beans and oilseedrape with up to 4 emerged true leaves. For larger beans or rape up to 6 emergedtrue leaves, increase the rate to 0.75l/ha. And for best effects on beans besure to use an adjuvant.
SPITFIRE will also tackle other keybroad-leaved weeds, such as poppy, brassicas, chickweed and shepherds purse.Its ingredients provide dual modes of action making it a valuable product tomanage the risk of herbicide resistance an emerging problem in some areas.