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Status of Invasive Plants in Delaware

Total number of exotic species reported: 359

Total number of records in EDDMapS: 1506


Invasive Plants by Category

  • Aquatic - 17 species, 126 records
  • Conifer Trees - 2 species, 4 records
  • Forbs/Herbs - 181 species, 505 records
  • Grass or Grasslike - 55 species, 192 records
  • Hardwood Trees - 36 species, 114 records
  • Shrub or Subshrub - 41 species, 164 records
  • Vines - 27 species, 141 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. hydrilla - 32 reports
  2. oriental bittersweet - 19 reports
  3. multiflora rose - 17 reports
  4. European privet - 16 reports
  5. Japanese honeysuckle - 16 reports
  6. mile-a-minute vine - 16 reports
  7. wine raspberry - 16 reports
  8. garlic mustard - 15 reports
  9. English ivy - 15 reports
  10. Japanese stiltgrass - 14 reports

Top Ten Widespread Invasive Plants (by number of positive counties)

  1. Japanese barberry - 3/3 (100%)
  2. porcelain-berry - 3/3 (100%)
  3. garlic mustard - 3/3 (100%)
  4. mimosa - 3/3 (100%)
  5. tree-of-heaven - 3/3 (100%)
  6. Norway maple - 3/3 (100%)
  7. princesstree - 3/3 (100%)
  8. kudzu - 3/3 (100%)
  9. Canada thistle - 3/3 (100%)
  10. oriental bittersweet - 3/3 (100%)

Counties with the most invasive species reported

  1. New Castle County - 411 species
  2. Sussex County - 238 species
  3. Kent County - 210 species

Counties with the least invasive species reported

  1. Kent County - 210 species
  2. Sussex County - 238 species
  3. New Castle County - 411 species

Report created on August 31, 2014 at 04:26 AM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.