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Pesticide News Story: Registration Review Schedule/Program Update Information Available

For Release: February 23, 2011

EPA has issued an updated schedule for the registration review program, the periodic review of all registered pesticides mandated by the Federal Insecticide, Fungicide, and Rodenticide Act. The updated schedule provides the timetable for opening dockets for the next four years of the registration review program, from fiscal year (FY) 2011 to 2014, and includes information on dockets that opened in FY 2007 through FY 2010. The schedule reflects the Agency’s plan to continue to open about 70 new dockets each year through 2017. Following this schedule, EPA will complete the first 15-year cycle of registration review by October 1, 2022, for all pesticides registered as of October 1, 2007.

The updated registration review schedule reflects EPA’s decision to review all pesticides in three groups – the imidazolinones, pyridines, and isothiazolinones – within the same time frame so that dockets for all will open in FY 2014. Imidazolinones are low-dose, high-potency herbicides that work by inhibition of the acetolactate synthase (ALS) enzyme in plants. Their mode of action is similar to that of the sulfonylurea (SU) family of herbicides, for which registration review dockets will open between FY 2011 and FY 2013. In addition, imazapyr was the only one of the imidazolinones to be subject to reregistration; registration review will provide the first opportunity to consider the six herbicides in this family in a common timeframe.

Pyridine herbicides, which are used to control a number of broadleaf plants, have primarily been identified in previous risk assessments as posing a potential risk to non-target plants. In particular, some herbicides in this family appear in reported incidents to have persisted in manure or compost later applied to planted fields. As with the imidazolinones, only a portion of the pyridine family was subject to reregistration, and registration review affords the Agency the opportunity to consider all the herbicides in this family in a common timeframe.

Isothiazolinones are a group of compounds known for biocidal activity that are registered with EPA as antimicrobial agents and have similar uses and use patterns. Some of the isothiazolinones have conventional pesticide uses, as well. EPA has adjusted the registration review schedule for the isothiazolinones so that all of the uses of this family of pesticides can be considered in a common timeframe, starting in FY 2014.

EPA is announcing the updated schedule as provided in Sections 155.42(e) and 155.44 of the Procedural Regulations for Registration Review: Final Rule (document number EPA-HQ-OPP-2004-0404-0052 at www.regulations.gov). The Agency may consider issues raised by the public or a registrant when reviewing a posted schedule, to schedule a pesticide registration review, or to modify the schedule of a pesticide registration review as appropriate. This schedule will be updated at least once every year.

The Schedule for Beginning Reviews and an explanation of the schedule are available at: Information about the status of individual pesticides in registration review is available at: Information about the registration review program is available at:

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