This Week in California Ag Regulation
July 27, 2026
One science release and one quarantine rulemaking headline this week, both with direct implications for how growers manage pest pressure and input costs.
State-funded study: no direct substitute exists for methyl bromide or MITC generators
DPR released the fourth and final report in its CCST-led fumigant alternatives study, finding that while alternatives to methyl bromide and MITC generators (dazomet, metam-sodium, metam-potassium) exist, none can serve as a 1:1 substitute. The report cites cost and effectiveness of alternatives as significant barriers and calls for more crop- and region-specific research at commercial scale.
CDFA moves to make Cotton Jassid exterior quarantine permanent
CDFA proposes to permanently adopt the emergency Cotton Jassid (two-spotted leafhopper) exterior quarantine under 3 CCR Section 3290, with a written comment period closing August 31, 2026. Existing law (FAC section 5311) allows a civil penalty of up to $2,500 for each violation of the regulation.
Key date: August 31, 2026: Written comment period closes on the proposed permanent Cotton Jassid quarantine regulation.