Crop protection

    Cards (24)

    • What do weeds compete with in agriculture?
      Crop plants
    • How do pests and diseases affect crop productivity?
      They damage crop plants, reducing productivity
    • What are the properties of annual weeds?
      • Rapid growth
      • Short life cycle
      • High seed output
      • Long-term seed viability
    • What are the properties of perennial weeds with competitive adaptations?
      • Storage organs
      • Vegetative reproduction
    • What type of animals are most pests of crop plants?
      Invertebrate animals
    • What organisms can cause plant diseases?
      Fungi, bacteria, or viruses
    • How are plant diseases often spread?
      By invertebrates
    • What are cultural methods for controlling weeds, pests, and diseases?
      • Ploughing
      • Weeding
      • Crop rotation
    • What are the advantages of pesticides?
      They can be selective or systemic
    • What is the purpose of herbicides?
      To kill weeds
    • What do fungicides control?
      Fungal diseases
    • What do insecticides target?
      Insect pests
    • What do molluscicides kill?
      Mollusc pests
    • What do nematicides target?
      Nematode pests
    • What is a selective herbicide?
      mimic plant growth hormones.
    • How does a systemic herbicide work?
      It spreads through the plant's vascular system
    • What is the effect of systemic insecticides?
      They kill pests feeding on plants
    • What are the problems associated with pesticides?
      Toxicity to non-target species and persistence
    • What is bioaccumulation?
      Build-up of a chemical in an organism
    • What is biomagnification?
      Increase in chemical concentration between trophic levels
    • What is biological control?
      • Use of natural predators
      • Use of parasites
      • Use of pathogens of the pest
    • What is integrated pest management?
      • Combination of chemical, biological, and cultural control
    • What is a risk associated with biological control?
      Control organism may become invasive
    • How can biological control affect other species?
      It may parasitise or prey on them
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