In simple terms there are two broad-leaved weed scenarios that require attention in fields this autumn:
- The ‘Compromised Residual’ – this can occur because of poor seed beds, dry conditions and residual applications made after the broad-leaved weeds have emerged.
In these situations both ZyparTM and SpitfireTM offer an ideal product to control a wide range of weeds including volunteer beans, volunteer oilseed rape, groundsel and chickweed. Both products cope well with cold autumnal conditions. Zypar, based on ArylexTM Active, has a wider weed spectrum than Spitfire and Zypar at 0.75 L/ha brings valuable control of Cranesbill, Poppy and Fool’s Parsley.
Both products can be applied in a tank mix with residual ‘top-ups’ that are now underway on many farms.
- The ‘Not Yet Sprayed’ – this is most likely in fields where grassweed pressure is lighter (so less requirement for residual ‘stacking’) and also where farm workload has meant that fields have yet to be sprayed with any herbicide.
In these situations it is very likely that there will be a significant flush of autumn germinating weeds and, depending on drilling date, these weeds could be 3-4 leaves and well beyond a growth stage that can be controlled by residual herbicides alone.
Spitfire and Zypar (both at 0.75 L/ha) have a strong fit in these situations, controlling a wide range of broad-leaved weeds and can be mixed with most residual herbicides to target annual meadow grass and other grass weeds. Based on a number of trials with Zypar plus a picolinafen based product such as Picona we have found that once this mix has been applied broad-leaved weed and annual meadow grass control is complete for the crop!
Notes: Maximum rate for Zypar before 15th February or Spitfire before 1st February is 0.75 L/ha. Zypar or Spitfire at 0.75 L/ha can be followed by Broadway™ Star in the spring (i.e. it is an approved ALS sequence).