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

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pear cactus, ornamental plants, and non-food crops. Methomyl has 24(c) registrations for insect control on ornamentals, beans, soybeans, radishes, sweet potatoes, Chinese broccoli, broccoli raab, and pumpkins. The a.i.s are therefore expected to be used throughout the growing season. Existing stocks of carbofuran are also expected to be applied throughout the growing season. Further, 16% of the DPS’ range consists of developed urban and residential land, mostly within the San Francisco Bay and Russian River basin. Carbaryl is expected to be used the entire year within the urban/residential areas. The CCC steelhead populations are all of the winter-type. Fry emerge in spring and rear in smaller tributaries and off-channel habitats. During periods with high flows, they move into floodplain habitat. Juvenile steelhead remain in freshwater for one or more years before migrating downstream to smolt. The registered uses of the three carbamates indicate substantial overlap with the CCC steelhead populations, especially in the San Francisco Bay, Russian River, and Santa Cruz area. We expect that the proposed uses of the three carbamates may contaminate spawning and rearing habitats and lead to both individual fitness level and population -level consequences. Thus, the risk to this species’ survival and recovery from the stressors of the proposed action is high for carbaryl, carbofuran, and methomyl. California Central Valley Steelhead The CCV steelhead DPS includes all naturally spawned steelhead in the Sacramento River, San Joaquin River, and their tributaries. This area includes streams entering the Sacramento-San Joaquin Delta (Delta) east of Chipps Island. All populations rear and migrate through the Sacramento River, San Joaquin River, Delta, and San Francisco Bay. The current distribution is severely reduced and fragmented compared to historical distributions. About 6,000 river miles of river habitat have been reduced to 300 miles. Historical returns within the DPS may have approached two million adults annually. Current annual run size for the entire Sacramento-San Joaquin system today is estimated at less than 10,000 returning adults. 462
The Status of Listed Resources and Environmental Baseline sections indicate that dams and other migration barriers, urbanization and channel modification, agricultural activities, introduced nonnative predators, hatcheries, and large scale water management and diversions negatively affect this DPS. Steelhead habitat has been highly degraded by reduced channel complexity, eroded banks, increased water temperature, migration barriers restricting access to cooler head waters, and decreased water quality from contaminants. Numerous NAWQA, CDPR, and other assessments found high concentration of contaminants in both the San Joaquin and Sacramento Rivers and their tributaries. In the San Joaquin Basin, seven pesticides exceeded EPA criteria for aquatic life. These pesticides include diuron, trifluralin, azinphos-methyl, carbaryl, chlorpyrifos, diazinon, and malathion. The combined impacts from these threats continue to affect the CCV steelhead. Approximately 27% of the land within the DPS is developed for cultivation of crops (Table 38). High densities of crop farming occur throughout the San Joaquin Basin, in the Sacramento-San Joaquin Delta, and along lower Sacramento River. Further, 9.2% of the DPS consists of urban development. Based on the crop types, we expect carbaryl, carbofuran, and methomyl are commonly applied in the Central Valley throughout the growing season. In urban and residential areas, we expect carbaryl to be applied throughout the year. Monitoring in the San Joaquin basin found 48 of 83 pesticides tested for. Seven pesticides (diuron, trifluralin, azinphos-methyl, carbaryl, chlorpyrifos, diazinon, and malathion) exceeded criteria for the protection of aquatic life. Pesticides detected in the Sacramento River included thiobencarb, carbofuran, molinate, simazine, metolachlor, dacthal, chlorpyrifos, carbaryl, and diazinon. Carbofuran was most often detected in agricultural sites while carbaryl was also found in all urban sites tested. All of the steelhead populations within this DPS exhibit the winter-type life history, though detailed information about the CCV steelhead life history is not available. Juvenile steelhead remain in freshwater for one or more years before migrating downstream to enter the ocean. The CCV steelhead use the lower Sacramento River and the Delta for rearing and as migration corridor. Some may utilize tidal marshes, non-tidal freshwater marshes, and other shallow areas in the Delta for rearing areas for short periods during outmigration to the ocean. 463
Page 1 and 2:
Ms. Debbie Edwards Director, Office
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National Marine Fisheries Service E
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Snake River Spring/Summer-Run Chino
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Commercial, Recreational, and Subsi
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Critical Habitat Risk Hypotheses ba
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Table of Figures Figure 1. Stressor
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Table of Tables Table 1. Registered
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Table 31. Area of Land Use Categori
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Table 67. . Examples of published f
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Agency: Activities Considered: Nati
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This Opinion is based on NMFS’ re
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activities that may improve EPA’s
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affect but is not likely to adverse
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On November 13, 2008, EPA provided
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On January 21, 2009, the agencies a
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in California, Idaho, Oregon, and W
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On that same date, EPA e-mailed NMF
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After registering a pesticide, EPA
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isk assessment. With these and othe
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Typically, formulations are combine
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EPA also issued generic and product
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pecans, peppers, pistachios, plums,
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Use Site plants, woody plants CRP a
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are subject to a four year phase-ou
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Table 2. Registered uses and applic
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mildews and other fungal diseases.
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methomyl are 32.4 lb a.i./acre/year
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would not likely adversely affect C
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In the final steps of our analyses,
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Evidence Available for the Consulta
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sustaining in the natural environme
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Stressors of the Action (see Figure
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Species Risk Hypotheses We construc
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habitats is then assessed. This por
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The problem formulation phase as ar
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Risk Characterization We follow the
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the probability of risk. In the Ris
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Figure 5. Map showing extent of inl
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Opinion. Summaries of the status an
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Chinook salmon are dependent on the
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Eureka Figure 6. CC Chinook salmon
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Table 6. CC Chinook salmon--prelimi
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Table 7 identifies populations with
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The CV drainage as a whole is estim
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have greatly reduced or eliminated
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Portland Salem Figure 9. LCR Chinoo
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important life history type remains
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Table 9. UCR Chinook salmon - preli
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In the most recent five-year geomet
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Figure 11. Puget Sound Chinook dist
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Status and Trends Puget Sound Chino
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flow, temperature, sediment load, w
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San Francisco Figure 12. Sacramento
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of historic spawning areas. Additio
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Status and Trends SR fall-run Chino
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Critical Habitat Critical habitat f
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Portland Seattle Spokane Figure 14.
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and five-year old fish, after two t
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surface and ground water and degrad
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Life History UWR Chinook salmon exh
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Bay, California. Historically, chum
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quality in the freshwater, estuarin
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Life History Chum salmon return to
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catastrophic events. Overall, the p
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Figure 17. Hood Canal Summer-run Ch
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improvements in 2000, with upward t
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ground water and degrade water qual
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San Francisco Figure 18. CCC Coho s
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Information on the abundance and pr
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Table 16 identifies populations wit
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Life History Although run time vari
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programs. The three major river sys
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Data on population abundance and tr
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Figure 21. Oregon Coast Coho salmon
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Preliminary spawner survey data for
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channels, backwaters, terrace tribu
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Figure 22. Ozette Lake Sockeye salm
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the 1997 status review due to resam
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Seattle Portland Figure 23. SR Sock
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Adult returns to Redfish Lake durin
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esume migration in early spring to
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Central California Coast Steelhead
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Status and Trends The CCC steelhead
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San Francisco Figure 25. California
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and Jackson 1996; McEwan 2001). Ste
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Olympia Portland Salem Figure 26. L
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hatchery fish in naturally-spawning
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species includes the only populatio
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Life History Most MCR steelhead smo
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Critical Habitat Critical habitat w
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Eureka Figure 28. Northern Californ
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may affect steelhead migration patt
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Of the 21 populations in the Puget
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Seattle Spokane Figure 30. SR Basin
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and spawner estimates for the Tucan
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San Jose Figure 31. S-CCC steelhead
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Figure 32. Southern California stee
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extinction,” with the remaining 1
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Portland Figure 33. UCR Steelhead d
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“low” for the Wenatchee and Met
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Figure 34. UWR Steelhead distributi
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Molalla/Pudding, Yamhill, Tualatin,
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Natural Mortality Factors Available
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Marine Mammal Predation Marine mamm
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downstream of Bonneville Dam. Socke
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Oceanographic Features and Climatic
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coincides with relatively poor ocea
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from streams in watersheds with agr
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chemicals used has decreased (Table
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California, Idaho, Oregon, and Wash
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to disease, decrease the ability of
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characterized by emergent aquatic p
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subregions and accounting units for
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Region USGS Subregion Central Calif
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Table 31. Area of Land Use Categori
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Table 33. Land uses and population
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(Table 34). See species ESU/DPS map
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undeveloped sites in the Santa Ana
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and grazing. Dams and water diversi
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Artificial Propagation Anadromous f
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water resources is handled by Calif
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containers at time of use. • Cond
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Table 36. Area of land use categori
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Columbia River Basin The most notab
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Ranching practices have led to incr
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17% of mainstem Yakima River sample
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detected in samples from all sites,
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Whitney 1979). Similarly, over one
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nation’s silver output has come f
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(USBR 1998 in (FCRPS 2008); providi
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The States of Oregon and Wasington
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Columbia River chum salmon are not
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including brown and brook trout, At
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density residential with some agric
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Although urban areas occupy only 2%
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Habitat Modification Much of the re
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Table 42. Pollutants of Concern in
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the 1950s. The vast majority of the
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pugettensis). An NPDES permit is re
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Habitat loss through wetland fills
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afted and moved to market or downst
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Oregon is in the process of develop
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Effects of the Proposed Action The
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Carbaryl dissipates in the environm
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high water solubility, low Kow, and
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Table 46. Environmental fate charac
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Species General Life History Descri
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Table 48. Examples of registered us
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Table 49. PRZM-EXAMS exposure estim
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estimate do not represent the highe
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BE provides a peak EEC of 5.5 μg/L
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alcoves, channel edge sloughs, over
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Carbaryl can also be applied at 8 l
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habitat had a downwind width of 10
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Depth of aquatic habitat (meters) B
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monitored in California, Idaho, Ore
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5.2 μg/L for carbofuran, 0.0150 -
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Summary information for carbaryl, c
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after flooding (Nicosia, Carr et al
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pesticide concentrations in the dis
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flowing water habitats, it is not s
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egistered products that contain mor
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potential ingredients in tank mixtu
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low maximum application rate. Howev
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occupy shoreline habitats of only a
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vertebrates and invertebrates (Walk
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Temperature and toxicity We found n
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exposure concentrations. Moreover,
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Summary of Toxicity Information Pre
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at several times during an experime
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Table 64. Assessment endpoint toxic
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fish, number of eggs per mature fem
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varigatus), an estuarine species, b
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included a NOAEC of 9.8 μg/L and a
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730 μg/L for D. magna (freshwater
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TEP) are contained in Appendix D-1.
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the uncertainties related to experi
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capacity (Little and Finger 1990).
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consumed relative to unexposed fish
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24 hr exposure (Zinkl, Shea et al.
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We located studies that measured ol
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endpoints of salmonids remains a re
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items (Courtemanch and Gibbs 1980;
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single pulse of chlorpyrifos was in
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Table 65. Study designs and results
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Chemical Taxa/species Assessment me
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Chemical Taxa/species carbofuran ca
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Chemical Taxa/species carbofuran ca
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macroinvertebrate community did not
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Jardine, MacLatchy et al. 2005; Luo
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Risk Characterization In this secti
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survival appears to be the most sen
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factor in the degree of toxicity of
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Figure 41. Methomyl exposure concen
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Table 67. . Examples of published f
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Additionally, the macroinvertebrate
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Measured Concentrations in Willapa
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up to 100 m off the carbaryl applic
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average initial concentration from
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• Unrelated (0): Conclusive evide
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the fish to determine the cause of
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Dose-addition assumes the cumulativ
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Table 73. Predicted AChE inhibition
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habitats during aerial applications
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The second line of evidence is whet
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D. Impair swimming which leads to r
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F. Exposure to mixtures of carbaryl
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used surfactant/adjuvant mixed with
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In a second modeling exercise, we t
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Carbaryl’s thresholds for the fou
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Table 75. Modeled output for Stream
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Table 77. Modeled output for Sockey
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The likelihood of scenarios 2 and 3
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The three insecticides are highly t
Page 429 and 430: A. B. C. Figure 43. Probability plo
Page 431 and 432: elatively low survival EC50 values
Page 433 and 434: dominated by agricultural or urban
Page 435 and 436: Figure 45. Percent change in lambda
Page 437 and 438: Table 80. Multiple application scen
Page 439 and 440: Because olfaction plays an importan
Page 441 and 442: expect co-occurrence of the three i
Page 443 and 444: support one or more lifestages. For
Page 445 and 446: We attempted to compare expected co
Page 447 and 448: Cumulative Effects Cumulative effec
Page 449 and 450: entry into freshwater systems. Carb
Page 451 and 452: Integration and Synthesis The Integ
Page 453 and 454: carbofuran applications could cause
Page 455 and 456: The Status of Listed Resources and
Page 457 and 458: also exposed to poor water quality
Page 459 and 460: Given the life history of LCR Chino
Page 461 and 462: Chinook salmon. Furthermore, there
Page 463 and 464: all three a.i.s are expected to be
Page 465 and 466: completing migration to the Pacific
Page 467 and 468: The major threats to this ESU ident
Page 469 and 470: Land use data indicate that the Col
Page 471 and 472: Central California Coast Coho Salmo
Page 473 and 474: Pesticide use and detections in LCR
Page 475 and 476: effects. In several streams, one or
Page 477 and 478: ESU is evergreen forest. Between 19
Page 479: miles where agricultural crops are
Page 483 and 484: carbofuran application to potatoes,
Page 485 and 486: The major threats to this DPS ident
Page 487 and 488: lowland areas (below 1,000 ft eleva
Page 489 and 490: consequences and subsequent populat
Page 491 and 492: and surface waters within the heavi
Page 493 and 494: 1994). Most juvenile steelhead spen
Page 495 and 496: salmon, Northern California steelhe
Page 497 and 498: natural cover such as submerged and
Page 499 and 500: The precise change in the conservat
Page 501 and 502: coho salmon, LCR coho salmon, South
Page 503 and 504: Table 81. Jeopardy and Non-Jeopardy
Page 505 and 506: Reasonable and Prudent Alternatives
Page 507 and 508: The RPA is comprised of six require
Page 509 and 510: Table 83. Mandatory pesticide no ap
Page 511 and 512: items will die from these exposures
Page 513 and 514: action will attain this level in th
Page 515 and 516: proposed action. Therefore, inciden
Page 517 and 518: 1. Minimize the amount and extent o
Page 519 and 520: met within the next 15 years, then
Page 521 and 522: Arunachalam, S., K. Jeyalakshmi, et
Page 523 and 524: Bortleson, G. C. and J. C. Ebbert (
Page 525 and 526: CDFG (1995). "Letter dated 30 March
Page 527 and 528: Davies, P. E. and L. S. J. Cook (19
Page 529 and 530: FCRPS (2008). "Endangered Species A
Page 531 and 532:
Haggerty, M. J., A. C. Ritchie, et
Page 533 and 534:
IEPSPWT (1999). "Monitoring, assess
Page 535 and 536:
government from 1896 to 1945." Repo
Page 537 and 538:
Matthews, G. M. and R. S. Waples (1
Page 539 and 540:
NMFS (2004). Five-year integrated p
Page 541 and 542:
PSAT (2004). "State of the Sound 20
Page 543 and 544:
Schroder, S. L. (1977). "Assessment
Page 545 and 546:
Tufts, D. F. (1990). "Control of bu
Page 547 and 548:
Williams, A. K. and C. R. Sova (196
Page 549 and 550:
Introduction To assess the potentia
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ocean-type and stream-type Chinook
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incorporates empirical data when av
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given a percentile value of 50 (i.e
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species-appropriate growth period (
Page 559 and 560:
For Figure 3C, an exposure pulse wo
Page 561 and 562:
the n x n square matrix (A) by assi
Page 563 and 564:
spawn (Pess et al. 2002). Survival
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distributed survival and reproducti
Page 567 and 568:
Figure 1: Life-History Graphs and T
Page 569 and 570:
Table 1. List of values used for co
Page 571 and 572:
Table 4. Matrix transition element
Page 573 and 574:
Figure 2. 555
Page 575 and 576:
Figure 4. 557
Page 577 and 578:
Brewer, S.K., Little, E.E., DeLonay
Page 579 and 580:
Higgs, D.A., MacDonald, J.S., Levin
Page 581 and 582:
Morgan, M.J., and Kiceniuk, J.W. 19
Page 583 and 584:
Scholz, N.L., Truelove, N.K., Frenc
Page 585 and 586:
Appendix 2. Species and Population
Page 587 and 588:
Chinook Salmon (continued) ESU Popu
Page 589 and 590:
Chum Salmon ESU Population λ - H=0
Page 591 and 592:
Coho Salmon (continued) ESU Populat
Page 593 and 594:
Steelhead (continued) DPS Populatio
Page 595 and 596:
Appendix 3: Abbreviations 7-DADMax
Page 597 and 598:
FQPA Food Quality Protection Act ft
Page 599 and 600:
PPE Personal Protection Equipment P
Page 601 and 602:
Appendix 4: Glossary 303(d) waters
Page 603 and 604:
Salmon fall to head upriver to its
Page 605 and 606:
Main channel The stream channel tha
Page 607 and 608:
Smolt A juvenile salmon or steelhea
Page 609:
WQS “A water quality standard def
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