Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
What is a pest?
|
An organism that competes with humans for food or space, or it could be a danger to health
|
|
|
What makes a good pesticide?
|
Specificity (toxic only to the organism at which it is intended), biodegradable (but chemically stable for long shelf-life), cost-effective (pests can develop resistances), not accumulate (so it does not build up in the food chain)
|
|
|
What makes an ideal biological control?
|
One which does not completely eradicate the pest but puts it to a level where it has little adverse effect
|
|
|
What are the advantages to biological control?
|
Very specific, once introduced, the control organism reproduces itself
Pests do not become resistant |
|
|
What are the disadvantages to chemical pesticides?
|
Always have some effect on non-target species
Must be reapplied at intervals, making them very expensive Pests develop genetic resistance, and new pesticides have to be developed |
|
|
What are the disadvantages to biological control?
|
They do not act as quickly
The control organism may itself become a pest |
|
|
What does integrated pest-control involve?
|
Choosing animal or plant varieties that suit the local area and are as pest-resistant as possible
Regularly monitoring the crop for signs of pests so that early action can be taken Removing pests mechanically (vacuuming!) Using biological agents if necessary Using pesticides as a last resort if pest is out of control ^^^ = minimum impact to environment |
|
|
What are the disadvantages of a monoculture?
|
Insect and fungal pests can spread rapidly
|
|
|
Pests of domesticated animals may cause what to happen to the animals?
|
Them to get a disease - reduced productivity
|
|
|
What are the two conflicting ideas of pest control?
|
Farmer has to satisfy demand for cheap food whilst making a living
Conservation - enabling us to continue to have food in the future |
