Part 1 of the review considered the non-food producing uses of fenthion. In December 2005 the APVMA published the toxicology, occupational health and safety and the environmental risk assessment for Non-food uses assessments as Volume 2 of the Preliminary Review Findings. The APVMA has since received new dermal absorption data indicating that fenthion is more readily absorbed than previously understood. This data may lead to further regulatory action for Part 1 of the review.
Part 2 of the review considered food-producing uses of fenthion. All the technical assessments for the review have been completed (see table below).
In September 2012, the APVMA published the revised toxicology assessment for fenthion.
In September 2012, the APVMA also published the Fenthion residues and dietary risk assessment report (which assessed all residues data provided by the registrant and by industry groups). Our assessment found that use of fenthion on certain crops could lead to consumers being exposed to levels of fenthion above the public health standard (the acute reference dose). Therefore we proposed that the use instructions for two fenthion products be modified to reduce dietary exposure risks. In October 2012 the APVMA suspended two horticultural products and imposed modified instructions for use during the suspension that restricted the use of fenthion on certain crops and mitigated the acute dietary exposure risks identified in the residues and dietary exposure assessment of September 2012.
In October 2013, the APVMA published a supplementary dietary risk assessment, including residues data submitted since October 2012. Due to the findings of this report, we continued the suspension of fenthion to 30 October 2014, with further changes to its use to remove uses of fenthion on peaches and apricots. The withholding period for use on nectarines and plums was changed to 14 days.
These changes to the approved uses of fenthion may have significantly affected previously used fruit-fly control methods and interstate trade arrangements for produce that may be a fruit-fly host. The Subcommittee on Domestic Quarantine and Market Access (a state and federal government committee) has developed a national response plan to deal with the outcomes of both the fenthion and the dimethoate reviews (dimethoate is also used for fruit fly control).
In May 2014, the APVMA published the occupational health and safety (all fenthion products), veterinary residues and dietary exposure and environmental assessments for fenthion. These reports are available as links below.