18 (20 marks) 24. Sustainability Research the risk-benefit model and apply it to

Question

18 (20 marks) 24. Sustainability Research the risk-benefit model and apply it to the debate over whether pests are best dealt with using biological controls or chemical controls (pesticides). Read page 732 for examples of biological control. You should use at least three examples in your discussion. Your work will be assessed based on the following rubric, where ea bullet is worth 5 possible marks. Score 5 Excellent Biological controls . Addresses advantages and disadvantages of both biological controls and pesticides in a clear manner .Shows insight into the complexity of the problem . shows excellent understanding of the concepts involved Writing/communication is excellent Addresses advantages and disadvantages of both biological controls and pesticides in a clear manner shows good understanding of the concepts involved writing/communication is very good 4 Proficient . 3 SatisfactoryMissing a few of the advantages and disadvantages Shows fair to weak degree of understanding of most concepts . Writing/communication is weak Identifies less than half of the advantages and disadvantages poor understanding of concepts 2 Limited . poor writing/communication 1 Poor addresses only one of the bullets at a 2 or 3 level

Explanation / Answer

Biological control: The biological control of pests uses biological processes such as sterile male technique and reproductive incompatibility. Pests like mosquitoes can also controlled by fishes like gambusia which feed on mosquito larvae. All these biological process of pest control are advantageous than chemical control because there is no damage to the environment and there will be no development of tolerance among the pests. The main disadvantage is the cost involved and complexity of the implementation.

Chemical control: The chemical control of pests involves the use of chemicals like Malathion, pyrethrum, mention, benzene hexafluoride etc. The main advantage is the ease of application of these pesticides. They are also cheaper when compared to biological control. The main drawback is the development of tolerance among the pests when these pesticides are used over a long duration of time.

Considering both, biological control of pests are preferred over chemical control albeit their drawbacks.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.