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Crop protection

QuestionAnswer
Name the 3 threats to having a high crop yield 1. weeds 2. pests 3. disease
Name the 3 types of pests 1, nematodes 2, insects 3. molluscs
The type of weed that has a short life cycle and rapid growth is annual weeds
Name one feature of perennial weeds storage organs or vegetative reproduction
Which type of weed requires systemic herbicide perennial
Which type of weed has high seed output and long term viability of seeds annual
Which type of pesticide kills broad leaved dandelion weeds but leaves crops alone selective herbicide
Name the organism that acts as a vector for plant disease pests/insects
Explain why fungicide is sprayed based on a forecast prevention of fungal disease is more effective than treating fungal cropa
Name the 5 types of pesticides 1, nematicide 2. molluscide 3. insecticide 4. fungicide 5. herbicide
Weed are killed by which type of pesticide herbicide
Define a systemic herbicide Spreads through vascular system of perennial plants and prevents regrowth
Which type of weed persists from year to year perennial weeds
Describe 2 problems with chemical control/pesticides 1. toxic to non target species 2. persists in environment 3, creates resistant species of pests 4 bioaccumuilation and biomagnification
When toxic pesticide builds up within ONE organism this is termed bioaccumulation
Define biomagnication When the pesticide concentation increases as you go up the food chain and becomes toxic to top predator
Define biological control When a natural predator is introduced to kill the pest
State one risk with biological control The introduced species can become an invasive species
Name the 3 methods of controlling pests, weeds and disease cultural, biological and chemical
Another term for using pesticides is chemical control
Give an example of cultural control ploughing field/weeding/crop rotation
What term is used for biological and chemical control combined integrated pest management
Which type of genetically engineered crop reducees the volume of pesticide required Bt toxin GM crops
Define a systemic pesticide Pesticide spreads through vascular system and kills insects/pests feeding on leaves
Explain how leaf eating crops reduce yield of crops (2 marks) Lowered photosynthesis (1) Less glucose for growth (2)
Created by: brightminds
 

 



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