We are traveling from Arizona to California with fresh produce. What items might we expect to have to throw away at the border?
This California government page discusses border inspections.
The page says:
WHAT ARE YOUR INSPECTORS LOOKING FOR?
Our inspectors check vehicles and commodities for compliance with California and federal plant quarantine regulations. They also check commodities to make sure they are free from exotic invasive species that may be hitchhiking with them. Although the primary focus is on plant materials (i.e., fruits, vegetables, nursery stock, hay, firewood, etc.), other items are also frequently inspected.
Briefly, you're advised to:
Have all plant material—including fruits, vegetables, plants, hay, and firewood—packed for easy access.
Ensure the driver knows what is in the vehicle and where it is packed.
Ensure the driver has keys or knows the combination for all door locks.
Ensure all doors (especially those of self-mover trucks and trailers) can be easily opened and closed.