Aclonifen Resistance Map, Germany
Description
This dataset provides a geo-referenced sensitivity and resistance map of three key grass weed species: Alopecurus myosuroides (blackgrass), Lolium multiflorum (Italian ryegrass) and Bromus sterilis (barren brome), to aclonifen, a soil-applied pre-emergence herbicide (HRAC Group 32, legacy F3) across Germany.
Aclonifen is screened as part of Agris42’s standard pre-emergence biotest panel, which means the populations here are characterized against the same product year after year on a consistent protocol, making the year-on-year trend directly comparable. Data were collected through the national monitoring program (2019–2025) and complemented with farmer-submitted resistance samples. Aproximate loctions are included for each sampling point that carries them.
Data Content
- 1,802 characterized grass weed populations (1,390 with GPS coordinates), every one with a measured result at the 1× field dose
- Resistance classification per population: resistant (≤50% efficacy), partial effect (51–89%), sensitive (≥90%).
- Efficacy values (% control at the 1× recommended field dose)
- Species identification per sample: ALOMY 1,280 · LOLMU 498 · BROST 24
- Per-species resistance profile
- Sampling date, crop and infestation score per population
- Landkreis and federal state per geo-referenced population
- Regional summaries per federal state available on request
Methodology
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- Seeds collected from monitored fields and farmer submissions across Germany
- Greenhouse biotests under controlled conditions (GEP-certified facility)
- Spray robot application for standardized dose delivery
- Soil-applied (pre-emergence) treatment at the registered 1× field rate, with a 0.5× rate alongside
- Control efficacy scored visually against an untreated control of the same population
- Reference sensitive population included in each test batch
- Replicate efficacy reads averaged per population and dose
Context & Typical Use Cases
- Resistance strategy development: aclonifen is a key pre-emergence partner for resistance management; this map shows where it still carries a programme and where it is already slipping.
- Market positioning: identify regions where Group 32 pre-emergence chemistry retains efficacy, or where alternatives are urgently needed.
- R&D prioritization: locate populations with specific resistance profiles for targeted experiments or follow-up dose-response studies.
- Regulatory data: use geo-referenced resistance data to support label amendments, efficacy claims, or resistance-monitoring submissions.
Extension Options
- Additional data from other countries (aclonifen is also screened outside Germany)
- Custom regional extract (e.g. only Hessen or Sachsen, the two best-covered states)
- Combined with the other pre-emergence actives of the same screening panel for a full soil-herbicide overview
- Combined with the prosulfocarb map (26_A8) for a two-target pre-emergence picture on the same populations
- Follow-up dose-response experiments on selected populations (full dose-response is withheld from the base product)
- Physical seed samples of characterized populations (on request)
- Annual update subscription (new monitoring-season data)
PRICING
On request
Quote provided within 2 business days
Dataset ID:
26_A13
Resistance Map
ALOMY, LOLMU, BROST
Aclonifen
HRAC Group 32 (legacy F3)
Germany
2019–2025
1,802
1,390
yes
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DELIVERY
- Structured spreadsheet (.xlsx / .csv)
- Geo-data as GeoJSON or shapefile
- PDF report with map and summary statistics
- Delivery within 5 business days of order