Weed Stuff

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Across
  1. 4. how plants are identified and named
  2. 6. plants growing where they are not wanted, out of place or have virtues that have not yet been discovered
  3. 9. ability of a formerly susceptible plant population to survive herbicide doses above those that were once used to control the original population
  4. 11. ability of a plant population to remain uninjured by herbicide doses normally used to control the plant species
  5. 12. the elimination of all plants and plant parts of a weed species from an area
  6. 14. plant population dies at herbicide doses that normally do not injure other plant species
  7. 16. a group of plants within a single species that has biological traits different in some portion form the entire population
  8. 17. temporary condition where live seeds fail to germinate even when appropriate levels of moisture, air, temperature and light are available
  9. 18. when one organism lives on, or with another organism, at whose expense it takes food, shelter, and/or support
  10. 19. live indefinetely
  11. 26. plants that produce one cotyledon
  12. 27. determines how tightly bound a herbicide can be held to a soil
  13. 28. 3-D natural body on the surface of the earth in which plants grow; contains living organisms and mineral components
Down
  1. 1. underground modified stem
  2. 2. preventative technique used to isolate and prevent the spread of a weed
  3. 3. common name for N-(Phosphonomethyl) glycine
  4. 5. most frequent method of weed control in rice
  5. 7. the firs herbicide that weeds were found to be chemically resistant to
  6. 8. non-woody, above ground stems that die each year in temperate climates
  7. 10. aboveground modified stem
  8. 13. inhibition of the growth of nearby plants through the production of biological toxins
  9. 15. how plants function internally
  10. 16. require 2 growing seasons to complete life cycle
  11. 20. movement through new tissue only through the xylem
  12. 21. movement through new and old tissue through the phloem
  13. 22. study of an organism in its environment
  14. 23. plants that produce two cotyledons
  15. 24. one growing season
  16. 25. an aquatic, aerial, or terrestrial environment