Specimen Information

Trapa bispinosa var. iinumai
Trapa bispinosa var. iinumai
(water chestnut)

Specimen ID1695767
Common Namewater chestnut
Localityprivate, 4 acre Creek View pond [site code CV-VA]
Mapping AccuracyAccurate
HUC8 NameMiddle Roanoke
HUC8 Number03010102
HUC10 NameRoanoke Creek
HUC10 Number0301010205
HUC12 NameWards Fork Creek
HUC12 Number030101020503
Collection Day21
Collection Month6
Collection Year2022
Year AccuracyActual
Potential Pathwayhitch hiker on waterfowl
CommentsInitial year 2020. Percent coverage 15-20%. Most of the shoreline has coverage. Landowner noticed it summer 2021 but it could have been there prior to that. Owners did not know how it got into the pond. Canada geese present on the pond. Live samples sent to Dr. Rob Richardson and John Odenkirk. Samples collected by Dan Michaelson on 6/21 and 6/23/22. Advising owners to use chemical herbicide and triploid Grass Carp (for young, spring growth) for eradication.
Record TypePersonal communication
Earliest Recorddrainage
VerifierJohn Odenkirk, Virginia Department of Wildlife Resources


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Citation information: U.S. Geological Survey. [2022]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [8/18/2022].

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