Mukul-2.pptx control borne disease of wihic shown about various aspects

Mukul-2.pptx control borne disease of wihic shown about various aspects

1. PRINCIPLES OF ARHHROPOD CONTROL The general principles of arthropod control are: 1. ENVIRONMENTAL CONTROL 2. CHEMICAL CONTROL 3. BIOLOGICAL CONTROL 4. GENETIC CONTROL

2. ENVIRONMENTAL CONTROL Best approach Results are likely to be permanent Intensive health education of the public as well as political support are essential prerequisites.

3. EXAMPLES Elimination of breeding places Filling and drainage operation Carefully planned water management Provision of piped water supply Proper disposal of refuse and other wastes Cleanliness in and around houses Carefully planned water management

4. CHEMICAL CONTROL Insecticides belonging to the, organo-phosphorus and carbamate are used. Not fully effective- over 100 species of arthropods has developed resistance To avoid undue environmental pollution, replace gradually the highly persistent compounds such as DDT with “ biodegradable ” and less toxic methoxychlor , abate and dursban . No alternate method which is efficient and economical as the insecticides

5. BIOLOGICAL CONTROL Use of larvivorous fish especially Gambusia. Fungi of the genus Coelomomyces are also pathogenic to mosquitoes. Biological agents- bacteria, fungi, nematodes, protozoa and viruses are under study for control of insects. But fear exists that introduction of biological agents may pose a direct hazard to the health of man itself.

6. GENETIC CONTROL WHO/ICMR contributed massively to the techniques of genetic control pf mosquitoes. Sterile male technique , cytoplasmic incompatibility and chromosomal translocations- effective in small field trials.

7. NEWER METHODS Insect growth regulators Chemosterilants Pheromones

8. INTEGRATED APPROACH No single method of control is likely to provide a solution in all situations. Present trend to adopt an “ integrated approach ” for vector control. Combines two or more methods with a view to obtain max. results with min. effort and to avoid excessive use of any one method .

9. Ques.1-Which of the following does not come under environmental method? A. Elimination of breeding places B. Cytoplasmic incompatibility Provision of piped water supply D. Cleanliness in and around houses

10. Correct answer: B

11. Ques.2 Which of the following compound is not “biodegradable” and less toxic to man & animals ? Methoxychlor Abate Dursban Organochlorine

12. Correct answer: D

13. Ques.3 Use of larvivorous fish-Gambusia to control mosquito comes under which method of arthropod control ? Environmental control Chemical control Biological control Genetic control

14. Correct answer: C