Chapter 13: Problem 3

Explain the pros and cons of using the synthetic organic pesticide DDT against malarial mosquitoes.

Short Answer

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DDT is a highly effective pesticide against malarial mosquitoes, with long residual life and mosquito deterrent properties. However, its downsides include serious environmental impact due to non-biodegradable nature, potential health risks to humans, and the possibility of mosquitoes developing resistance.

Step by step solution

Identify Advantages of Using DDT

DDT (Dichlorodiphenyltrichloroethane) has been widely used due to its efficiency in controlling malarial mosquitoes. Following are the benefits: \n\n1.1 Efficacy: DDT is highly effective at killing mosquitoes, which can help in reducing the prevalence of mosquito-borne diseases like malaria. \n\n1.2 Residual Life: DDT possesses a long residual life (can remain effective for 6-12 months after application), meaning less frequent applications are needed, making it cost-effective. \n\n1.3 Deterrence: It not only kills mosquitoes but also acts as a deterrent, discouraging mosquitoes from entering the sprayed homes.

Identify Disadvantages of Using DDT

Despite its effectiveness, the use of DDT is correlated with several downsides:\n\n2.1 Environmental Impact: DDT is non-biodegradable and can accumulate in the environment and the food chain, impacting other wildlife species as well. \n\n2.2 Health Impact: Consequent exposure can cause health issues in humans like cancer, neurological damage, and fertility problems. \n\n2.3 Resistance: Mosquitoes can develop resistance to DDT over long term usage, rendering it ineffective.

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Explain the pros and cons of using the synthetic organic pesticide DDT against malarial mosquitoes.

Short Answer

Step by step solution

Identify Advantages of Using DDT

Identify Disadvantages of Using DDT

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