Summary information on residues and explanation >>
The 4 main categories of substances with respect to MRLs
1. Approved active substances (PPP-approved)
They have:
- authorised uses
- established MRLs per crop/commodity
MRLs are based on:
- GAP (Good Agricultural Practice)
- residue trials
- ADI / ARfD
2. Not approved but with an MRL
This is very common and often causes confusion.
Examples: DDT, Aldrin / Dieldrin, Vinclozolin, Parathion, Endosulfan
This applies because:
- MRLs are used:
- for the control of imported products
- for the detection of illegal use
- they are usually:
- LOQ-based (e.g. 0.01 mg/kg)
MRL ≠ authorisation of use
3. Substances listed in Annex IV (No MRL required)
This category includes: basic substances, natural products, microorganisms, pheromones
Characteristics:
- no MRL is required
- not because they “leave no residues”, but because:
- there is no toxicological concern
- or residues are not considered relevant
Examples:
- microorganisms (Trichoderma, Bacillus, etc.)
- pheromones
- acetic acid
- sucrose
- plant oils (in specific cases)
4. Substances outside the scope of MRLs
-
Examples: nutrients (N, P, K), nitrates, calcium, iron, CO₂, oxygen, urea (when used as a fertiliser)
-
Regulated under: food safety, environmental pollution, nutrition
Important!
The fact that an active substance appears in the list of
Maximum Residue Limits (MRLs)
does not mean that its use is automatically permitted in the crop.
For all pesticide residues in plant-based products:
https://ec.europa.eu/food/