California DPR Pesticide Reporting for Vineyards
California has the most comprehensive pesticide use reporting system of any state in the United States. Every commercial agricultural pesticide application must be reported monthly, including general use pesticides that are exempt from federal reporting requirements. For vineyard operators, this means that every fungicide, herbicide, insecticide, and foliar nutrient application goes into the public record through the California Department of Pesticide Regulation (CDPR) system.
Who Must Report
The reporting obligation falls on the person or entity responsible for the application. If you apply pesticides yourself with your employees, you are the reporting entity. If you hire a licensed pest control operator (PCO), they are responsible for reporting their own applications. If you use a licensed pest control adviser (PCA) who also acts as the applicator, same principle applies.
This distinction matters in practice. If a contractor applies pesticides on your vineyard and fails to report, you need to verify compliance or risk being associated with the violation. When hiring contract applicators, include a reporting compliance clause in your service agreement and ask for confirmation of submission each month.
Monthly Reporting Deadlines
Pesticide use reports (PURs) must be submitted to the county agricultural commissioner (CAC) in the county where the application occurred by the 10th of the following month. March applications are due April 10. November applications due December 10. Late submissions are a violation, even if the application itself was entirely compliant.
Applications that cross county boundaries require separate reports for each county. Vineyards that straddle county lines are common in California's wine regions, and this is a detail that gets missed more often than it should.
Required Data on the Pesticide Use Report
California PURs require more information than federal records. Every submission must include: applicator name and license number, date and time of application, county where applied, geographic location (township, range, section or a site-specific description), commodity type and code (for wine grapes: use commodity code for grapes/wine), pesticide product name, California registration number, EPA registration number, total amount applied, unit (pounds, gallons, or other), application method, and pest or pest category managed.
The commodity code is frequently incorrect on vineyard PURs. Wine grapes, table grapes, and raisin grapes have separate commodity codes in the CDPR system. Using the wrong code generates a reportable error and requires correction.
County Agricultural Commissioner
The CAC is your primary regulatory contact for pesticide compliance in California. Each of the 58 counties has its own commissioner, and enforcement practices, preferred submission methods, and response times vary by county. Most now accept or require electronic submission through the state's eDPR portal. Some rural counties may still accept paper forms.
Building a working relationship with your county's CAC office is practical. When you have a compliance question, the CAC is the right first call. When an inspector identifies a record discrepancy in the field, the CAC is who you'll hear from. Being known as a grower who takes compliance seriously, rather than one who only engages reactively, makes those interactions easier.
Restricted Use Pesticides: Additional Requirements
For restricted use pesticides (RUPs), California requires a written recommendation from a licensed PCA before any application. This recommendation must be on file and retained for two years. The application must be made by or under the supervision of a licensed Qualified Applicator License (QAL) or Qualified Applicator Certificate (QAC) holder.
Most commonly used fungicides and herbicides in wine grape production are general use pesticides. But some insecticides, particularly those used for mealybug and leafhopper management in high-pressure years, are restricted use. Know which products in your program require a PCA recommendation before purchase and application.
Penalties
CDPR and CAC enforcement ranges from written warnings for first-time, minor administrative violations to civil penalties of $1,000 to $5,000 per violation per day for repeated or willful non-compliance. Falsification of pesticide records can result in criminal penalties and license revocation. The most commonly cited violations in vineyard operations are late submissions, incomplete fields (particularly missing California registration numbers), and applications made without required PCA recommendations for RUPs.
The practical risk for most growers is not a major fine but a correction notice that requires time, administrative attention, and sometimes a CAC visit. The best way to avoid this is a record-keeping system that captures all required fields at the time of application rather than reconstructing them later.
Making Monthly Reporting Manageable
California DPR reporting should be a compilation task, not a research project. If your spray records are complete on the day of application with all required fields, monthly report preparation is transferring data to the submission format. If records are incomplete or scattered across paper logs in the spray shed, it becomes a time-consuming reconstruction.
VitisScribe captures California-required fields in the spray logging workflow and generates monthly PUR summaries that map directly to CAC submission requirements. Growers using the system for daily spray records find that monthly DPR reporting takes under an hour, including verification.
Related reading: vineyard spray record keeping requirements and PHI and REI compliance in the vineyard.
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