Crop Protection Flashcards
What do weeds compete with?
Weeds compete with crop plants, while other pests and diseases damage crop plants, all of which reduce productivity
Properties for annual weeds
• rapid growth
• short life-cycle
• high seed output
• long-term seed viability
What are properties of perennial weeds with competitive adaptations?
Perennial weeds with competitive adaptations - storage organs and vegetative reproduction.
What are most of the pests of crop plants?
Most of the pests of crop plants are invertebrate animals such as insects, nematode worms and molluscs.
What can plant diseases be caused by?
Plant diseases can be caused by fungi, bacteria or viruses, which are often carried by invertebrates.
Examples of culture methods to control weeds, other pests and diseases
• Ploughing
• weeding
• crop rotation
What do pesticides include?
Pesticides include herbicides to kill weeds.
What do fungicides control?
Fungicides control fungal diseases.
What are insecticides for?
Insecticides used to kill insect pests.
What are molluscicides used for ?
Molluscicides are used to kill mollusc pests.
What are nematocides used for?
Nematocides are used to kill nematode pests
Advantage of pesticides
Selective or systemic
Selective herbicides…
Have a greater effect on certain plant species (Broad leaved weeds).
Systemic herbicide…
Spreads through vascular system of plant and prevents regrowth.
Systemic insecticides, molluscicides and nematicides spread through what?
Spread through the vascular system of plants and kills pests feeding on plants.
