chemical use
   Chemical use
  Objective  Avoid chemical residues in grain that exceed acceptable limits. Minimise adverse impacts of chemical application in-crop and in storage.
  • Comply with current label/permit and state regulations for all agricultural chemical use. Note that labels and permits are specific to a product and not always replaceable with a generic product with the same active ingredient for a given use.
  • Refer to relevant codes of practice or industry guidelines. If acting outside of these recommendations ensure a suitable alternative has been identified and documented.
  • If your contract defines a destination market, check whether it has more stringent maximum residue limits (MRLs). If it does, your chemical program may need to be adjusted so that these MRLs are not exceeded.
  • Monitor weather at the start, during and completion of spraying.
  • Accurately identify pests (insects, weeds or diseases).
  • Consider pest biology and thresholds in decisions.
  • Match product to crop type, crop growth stage and pest. Consider resistance management.
  • Match application method to suit mode of action and growth stage of crop and target pest.
  • Use spray application equipment and settings that are suited to the use. Ensure staff, advisors and contractors have suitable skills, experience and qualifications.
  • Ensure staff, advisors and contractors have suitable skills, experience and qualifications.
  • Report spray drift and pesticide incidents according to state requirements.
  • Within 24 hours of each chemical application make an accurate record, to be kept for at least 2 years according to state regulations and label requirements. Depending on your state and the chemical product label this may include:
    • Date with start and finish times of application;
    • Locations, address and paddock/s sprayed (farm map can be used);
    • Full name of the product;
    • Amount of product used per hectare & number of hectares applied to;
    • Crop/situation and weed/pest;
    • Wind speed and direction during application;
    • Air temperature and relative humidity during application;
    • Nozzle brand, type, spray angle, nozzle capacity and spray system pressure measured during application;
    • Name and address of person applying this product;
    • Personal protective equipment used;
    • Batch number where required by the state or territory;
    • Any additional information required as directed by label or permit.
  • Store chemicals and dangerous goods in accordance with Australian standards, label requirements and safety data sheets. For example bunding, ventilation, signage, security and safety.
  • Maintain a chemical inventory for hazardous chemicals and dangerous goods.
  • Keep current safety data sheets (SDS) at the point of use, accessible to all staff.
  • When transporting and storing dangerous goods comply with the most current Australian Dangerous Goods (ADG) code.
  • When transporting other chemicals, use safe practices and restrain as required.
  • Follow safe chemical handling practices such as using personal protective equipment (PPE) and ensuring load lifting weights are safe for the operator.
  • Notifying authorities as required in the event of a spill or exposure.


  • Monitoring weather at least at the start of each chemical load and at the end of the job.
  • Maximising efficacy and avoiding off-target movement or drift of chemicals. For example:
  • Applying chemicals under optimal weather conditions, using:
    • Weather forecasting to plan spray application jobs.
    • Tools to assess suitability of weather conditions for application (evaporation & droplet survival), assessed at the site.
    • Assessment of inversion risk before and during spraying.
  • Referring to sensitive area maps before spraying. (eg BeeConnected; CottonMap)
  • Using suitable strategies to reduce drift, eg adjuvants, droplet sizes and equipment.
  • Calibrating chemical application equipment to ensure it meets desired standards. Testing outputs of all nozzles, speed sensors and flow meters.
  • Regularly checking nozzle patterns, nozzle flow along the boom and ground speed.
  • Agitating the spray tank sufficiently for the load to be uniformly mixed.
  • Considering adjuvants and tank mix partners in relation to water quality, crop safety, efficacy, spray drift potential and odour.
  • Avoiding holding mixed product in tanks for extended periods.
  • Ensuring thorough incorporation and mixing of chemicals applied to grain in storage.
  • Decontaminating equipment.
  • Using a suitably qualified advisor.
  • Developing a resistance management plan with your adviser to proactively identify and manage pesticide resistance risks.
  • Developing a pesticide use plan that includes application methods, drift risks and integrated pest management (IPM). Discussing this with your adviser before and during each season.
  • Notifying neighbours of your seasonal pesticide use plan and planned spray applications.
  • Using closed systems for mixing, transfer and application of pesticides.
  • Recording any additional information needed for a commodity vendor declaration, delivery document and/or quality assurance scheme.
  • Keeping records in an integrated farm management package with a farm map that identifies individual paddocks or management units, risk areas and hazards.
  • Recording crop growth stage and batch numbers of all chemicals used.
  • Obtaining all advisor recommendations in writing and keeping with records.
  • When using spray contractors:
Provide the spray contractor with:
  • Written spray orders (paper or electronic) that include weather conditions suitable for spraying.
  • Accurate farm maps, including sensitive areas and contact details.
  • Farm biosecurity action plan and pesticide use plan. Obtain from the spray contractor:
  • Copies of chemical users accreditation, necessary licence/s and certificates of currency for workers compensation and public liability insurance.
  • Written spray application records on completion of each spray job (paper or electronic).
  • Maintaining an up-to-date inventory of all stored chemicals.
  • Returning or disposing of chemical containers and unused chemicals through ChemCleardrumMUSTER or similar programs.
  • Considering and managing the risks when using chemical mixing sites and trailers.
  • Preparing an emergency response plan in case of a spill (spill kit, actions, notification and first aid).
Aust Grain 100 tr