Today is our topic of discussion Review and test

Review and test

 

 

Read the report and answer the questions that follow.

Aerial application of insecticides was carried out from 10 to 24 October 1991 over Khulna divisions to control Hispa and Stemborer in rice. In order to observe impacts on the environment, a few ponds and lakes were surveyed.

The results indicated that within 9 hours of aerial application of the insecticide small fishes in ponds were found dead and floating on the surface of water in Morrelganj, Batiaghata, Dumuria and Tala thanas. Due to this spraying even ‘gherey’ fishes were found dead.

In ghereys, fishes are cultured with the help of temporany dams and nets in small waterways. Two/three days after the spraying of the chemicals from the air small fishes were sold cheap in local markets. At Batiaghata the Imam of a mosque informed that due to the application of pesticides in that area one cow and two goats died.

In some other areas domestic animals developed diarrhoea due of this application of pesticides. In Morrelganj thana some convicts suffered from an eye disease. In future, to minimise the environmental pollution, integrated pest management should be introduced instead of applying pesticide through aerial operation.

 

 

Questions:

1. Suggest two titles for the survey report.

2. What was the purpose of the survey?

3. What was the impact of the aerial application of insecticides on ponds, lakes and ‘gherey’s?

4. How did the chemicals sprayed from an aircraft affect animals and humans?

5. How should the pest control methodology as suggested by the surveyor differ from the aerial spraying of pesticides?

Answer these questions.

1. What are Hispas and Stemborers?

2. How should they be controlled since aerial application of insecticides causes harm to the environment?

 

 

3. Write why aerial use of insecticides is harmful and how it causes harm at home, in the fields and in water.