WEED SCIENCE 2044

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WEED SCIENCE2044
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CHARACTERISTICS OF WEEDS

• RESOURCE COMPETITION
• Light, Water, Nutrients
• CROP QUANTITY
• Reduces Yield
• CROP QUALITY
• Reduces Crop Quality Market Value

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CHARACTERISTICS OF WEEDS

• HARVESTING AND PROCESSING
• Interference with harvesting and processing
• Adds extra costs to clean and transport
• HOST FOR OTHER ORGANISMS
• Diseases
• Nematodes
• Other Insects

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CHARACTERISTICS OF WEEDS

• GROWTH HABITAT
• Terrestrial or Aquatic
• Herbaceous or Woody
• LIFE CYCLE
• Summer Winter Annuals
• Biennials
• Perennials

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CHARACTERISTICS OF WEEDS

• DICOTS
• Broadleaved
• Two Cotyledons
• Tap Roots
• Less Cold Tolerate

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CHARACTERISTICS OF WEEDS

• MONOCOT
• Grass-Like
• One Cotyledon
• Fibrous Roots
• More Cold Tolerate

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CHARACTERISTICS OF WEEDS

• PARASITIC WEEDS
• Derive food and water from host plant
• Example mistletoe
• POISONOUS WEEDS
• Can have toxic affect on both humans and
  livestock
• Example Cocklebur and Poison Ivy

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CHARACTERISTICS OF WEEDS

• POPULATION DENSITY
• More weeds MORE PROBLEMS
• ALLELOPATHY
• The production of a chemical compound that
  inhibits the growth of other nearby plants
• EXAMPLE
• Quackgrass Rhizomes
• Giant Foxtail

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CONCLUSION

• WEEDS NEED TO BE CONTROLLED
• Economic Loss
• Reduction of Quality
• Reduction of Seed Production