Chemical residue resources

Agriculture Victoria has a number of resources that can be helpful when managing chemical residues in primary produce. The following information can be used as a guide when:

  • taking samples for residue analysis
  • observing withholding periods
  • managing cross-contamination from farm infrastructure
  • avoiding crop damage from residual herbicides.

Chemical residue guidelines

Managing chemical residues in crops and produce

Chemicals play an important role in agriculture. Growers should be mindful of consumers increasing concerns about chemical residues in produce.

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Managing chemical cross-contamination risks

Cross contamination can occur when harvested grain comes into contact with treated seed and surfaces of storage and transport infrastructure

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Managing the risk of chemical cross-contamination in horticulture

Cross contamination most commonly occurs during handling and storage of fresh produce after it has been harvested.

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Withholding period statements on labels

A withholding period (WHP) can be defined as the minimum period of time that must elapse between the last application of an agricultural or veterinary (agvet) chemical product, and the ‘use’ of the agricultural produce to which the chemical was applied.

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Avoiding crop damage from residual herbicides

When researching the residual activity and cropping restrictions following herbicide application, the herbicide label is the primary source of information and should be readthoroughly.

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Sampling soils, vegetables, fruit and grain for residue testing

These guidelines aim to provide the information necessary to allow you to take a representative sample that can be sent to National Association for Testing Authorities (NATA) accredited laboratories for testing.

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Sampling bees for residue testing

Information about how to take samples of bees for residue testing.

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Page last updated: 10 Jul 2023