Crop Protection Flashcards
What is meant by monoculture?
Growing a crop with only one species, increases chances of pest or disease outbreak
What traits do perennial weeds have?
Storage organs and vegetative reproduction
What traits do annual weeds have?
Large number of seeds, long-term seed viability, short life cycle, grow rapidly
What is a fungicide?
Kills fungus
What is a perennial plant?
Lives for many years
What is an annual plant?
Life cycle occurs in one year
What is a herbicide?
Kills weeds
What is an insecticide?
Kills insects
What is the difference between systemic and selective herbicides?
Systemic are taken into plant tissues, selective only affect plants with broad leaves
When would you use a selective herbicide?
On grass crops where only weeds with broad leaves are affected
When would a systemic herbicide be useful?
If weed has underground storage structures that could regrow if left behind
Give some examples of cultural methods of crop protection
- Growing a cover crop
- Ploughing
- Crop rotation
What would be the characteristics of an ideal pesticide?
Specific to pest, short lived, safe
What is bioaccumulation?
pesticide remains in tissues over time and builds up faster than it can be removed
What is biomagnification?
When the concentration of pesticide increases at each trophic level in food chain and can reach toxic levels near top
