Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

Examples of Registered Formulations and Types.
End-use formulations of methomyl include soluble concentrate, wettable powder,
granular, pelleted/tableted, and water soluble packaged. Products registered as fly baits
also contain (Z)-9-tricosene (0.04 to 0.26% a.i.) as an a.i.; labels note that these products
contain a sex attractant and feeding synergist (EPA 2003).
Examples of Approved Methods and Rates of Application.
Application Equipment. Methomyl can be applied by aircraft; bait box; brush; cup;
duster; glove; granule applicator; ground; high volume ground sprayer; low volume
ground sprayer; package applicator; scoop; shaker can; shaker jar; sprayer; and ultra low
volume sprayer (EPA 1998).
Application Rates. The maximum single application rate allowed on the labels for
agricultural uses in California, Idaho, Oregon, and Washington is 0.9 lb a.i./acre. Many
agricultural uses allow repeated application of methomyl at relatively short intervals (1-5
days). For example, the application interval for methomyl for sweet corn is one day and
methomyl can be applied 28 times within a single crop of sweet corn. Additionally,
several crops of sweet corn may be grown per year in some locations within the action
area (EPA 2007). The maximum seasonal labeled application rates (indicated on the
label as maximum application rates per crop) for agricultural uses range from 0.9 lb
a.i./acre/crop [i.e., Bermuda grass (pasture), avocado, lentils, beans (interplanted with
trees), sorghum, and soybeans (interplanted with trees)] to 7.2 lbs a.i./acre/crop [i.e.,
cabbage, lettuce (head), cauliflower, broccoli raab, celery, and Chinese cabbage].
Several methomyl crops can be grown more than one time per year (i.e., they have
multiple crop cycles). Therefore, for those methomyl uses that have more than one crop
cycle per year, the maximum allowable yearly application rate will be higher than the
maximum seasonal application rate. For perennial crops (e.g., alfalfa), the number of
cuttings per year was used to determine the number of crop cycles per year. Based on the
labeled application rates and information from EPA’s OPP Benefits and Economic
Analysis Division (BEAD) on the number of times each crop for which methomyl is
registered for use can be grown in California, the maximum yearly application rates for
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