Technical Specifications
Product Registration Number:
MAPP 16184
Active Ingredient:
500 g/litre propyzamide + 5.3 g/litre aminopyralid
Pack Size:
10.0 Litres
Formulation:
Suspension Concentrate
Maximum Individual Dose:
1.7 L/ha – the blackgrass rate. In other situations use 1.5 L/ha
Maximum Total Dose:
One per crop
Latest Timing:
Before 1st Feb in the year of harvest
Water Volumes:
200 – 300 L/ha
Spray Quality:
MEDIUM as defined by the BCPC
LERAP:
None
AstroKerb and oilseed rape straw: Do not bale or remove straw from the field unless it is to be used for burning for heat or electricity production. The straw should be chopped and thoroughly incorporated after harvest. Do not feed animals with treated straw, or use it for animal bedding, composting or mulching.
To optimise AstroKerb's performance, there are three areas to be considered – soil temperature, soil moisture and weed seed depth. Soil temperatures need to be cooling - around 10ºC and falling at 30 cm depth, meaning the herbicide is slower to breakdown and that longer persistence is achieved throughout the weed germination period.
Good levels of soil moisture are needed to help the herbicide distribute evenly in the top few centimetres of the soil thus the soil moisture deficit should be less than 50mm and falling. Soils must not be waterlogged or saturated. Care must be taken to avoid any risk of contamination to water and importantly, all aspects of good Stewardship applied.
The propyzamide in AstroKerb forms a shallow layer in the soil, about 2.5-5cm. Blackgrass seed germinating in this zone will be well controlled however blackgrass germinating below this will be poorly controlled. High levels of control are achieved where less mixing of the soil takes place (direct drilling etc.) and thus black grass seed remains within the top 5cm of soil. Avoid deep cultivations in a preceding winter wheat crop and in the oilseed rape crop as this will distribute black grass seed throughout the soil profile away from the 5cm propyzamide zone of activity.
Decades of trials and wide field experience across the UK has demonstrated that using full-rate Kerb Flo 500 or ASTROKerb from November onwards when soil temperatures are 10 C and falling gives the most reliable and most persistent control of black-grass year after year.
Tank mixes, sequences and programmes
Wide range of fully supported tank mix partners
- Centurion Max – do not tank mix – sequence only
- Remember only 2 fop/dim applications can be made to an OSR crop. Consider a programmed approach with AstroKerb to maximise volunteer cereal and other grass weed control.
- Astrokerb in mixture with PGR fungicides, especially if the crop is under stress, may cause an additive PGR effect.
- Call Corteva Agriscience Hotline (0800 689 8899) for the latest on tank mix , sequences and programmes involving AstroKerb
