Weed Stuff

4. how plants are identified and named
6. plants growing where they are not wanted, out of place or have virtues that have not yet been discovered
9. ability of a formerly susceptible plant population to survive herbicide doses above those that were once used to control the original population
11. ability of a plant population to remain uninjured by herbicide doses normally used to control the plant species
12. the elimination of all plants and plant parts of a weed species from an area
14. plant population dies at herbicide doses that normally do not injure other plant species
16. a group of plants within a single species that has biological traits different in some portion form the entire population
17. temporary condition where live seeds fail to germinate even when appropriate levels of moisture, air, temperature and light are available
18. when one organism lives on, or with another organism, at whose expense it takes food, shelter, and/or support
19. live indefinetely
26. plants that produce one cotyledon
27. determines how tightly bound a herbicide can be held to a soil
28. 3-D natural body on the surface of the earth in which plants grow; contains living organisms and mineral components

1. underground modified stem
2. preventative technique used to isolate and prevent the spread of a weed
3. common name for N-(Phosphonomethyl) glycine
5. most frequent method of weed control in rice
7. the firs herbicide that weeds were found to be chemically resistant to
8. non-woody, above ground stems that die each year in temperate climates
10. aboveground modified stem
13. inhibition of the growth of nearby plants through the production of biological toxins
15. how plants function internally
16. require 2 growing seasons to complete life cycle
20. movement through new tissue only through the xylem
21. movement through new and old tissue through the phloem
22. study of an organism in its environment
23. plants that produce two cotyledons
24. one growing season
25. an aquatic, aerial, or terrestrial environment