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Ballard County, Kentucky

Information provided for informational purposes only

Note: This information is provided for reference purposes only. Although the information provided here was accurate and current when first created, it is now outdated.

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Pesticide Table | About the Orange-Footed Pearly Mussel
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Pesticide Table for Orange-Footed Pearly Mussel

Active Ingredient Code

Limitations On Pesticide Use

Code Limitations
1 Do not apply this pesticide within 20 yards from the edge of water within the shaded area for ground applications, nor within 100 yards for aerial applications.
1c For ground applications, do not apply this pesticide within 20 yards from the edge of water within either the shaded area or the upstream protection zone (1/2 mile up all tributaries that join the shaded area). For aerial applications, do not apply this pesticide within 100 yards from the edge of water within the areas described above.
20 Do not apply directly to water within the shaded area.

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Orange-footed (pimple back) pearly mussel (Plethobasus cooperianus)

This mussel is circular and may be up to 3.7 inches long and 1.8 inches thick. The shell color ranges from yellowish brown to chestnut brown and is marked by dark, irregular, concentric growth lines. The posterior two-thirds of the shell has numerous raised knobs. The inner color ranges from white to pink. The mussel is found in medium to large rivers at depths of 12 - 29 feet where it buries itself in the sand, feeding by water filtration. Some individuals may live up to 50 years.

Historically, the orange-footed pearly mussel occupied the Ohio, Cumberland and Tenessee river drainage basins. It currently is found in the Tenessee River: i) below the Fort Loudin Dam (Loudin County, TN); ii) below the Guntersville Dam (Marshall County, AL); and iii) below the Pickwick Dam (Hardin County, TN). In the Ohio river, it only orrurs below the Cordell Hull Dam (Smith County, TN). Other populations survive in the lower Ohio River between Metropolis and Mound City, IL.

The single greatest reason for the mussel's decline has been construction along the Cumberland and Tenessee river basins of dams for flood control, hydroelectric power production, navigation and recreation. In addition to dams, the Ohio and Wabash river systems have been impacted by deforestation and agricultural practices that increase water turbidity and siltation. Water quality has further been degraded by chemical runoff, industrial effluents, and sewage. Recovery of the species depends on efforts to reclaim its river habitat throughout the Interior Basin.

Mosely, C.J. (ed.), The Official World Wildlife Fund Guide to Endangered Species, Beacham Publishing Inc, Washington, DC. pp. 997-8.

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