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ENT 604  INSECT NUTRITION AND HOST PLANT RESISTANCE                                                                 (2L+1P) III

Objective
To familiarize the students with types, basis, mechanisms and genetics of resistance in plants to insects and role of plant resistance in pest management. nutritional physiology and their application in entomology.

Theory

UNIT I
History and importance of resistance, principles, classification, components, types and mechanisms of resistance.

UNIT II
Insect-host plant relationships; theories and basis of host plant selection in phytophagous insects.

UNIT III
Chemical ecology, tritrophic relations, volatiles and secondary plant substances; basis of resistance; induced and acquired resistance.

UNIT IV
Factors affecting plant resistance including biotypes and measures to combat them.

UNIT V
Screening techniques; breeding for insect resistance in crop plants; exploitation of wild plant species; gene transfer; successful examples of  resistant crop varieties in India and world. Role of biotechnology in plant resistance to insects.

UNIT VI
Insect nutrition - role of vitamins, proteins amino acids, carbohydrates, lipids, minerals and other food constituents; extra and intra-cellular micro-organisms and their role in physiology, artificial diets.

Practicals
Screening techniques for measuring resistance, measurement of plant characters and working out their correlations with plant resistance; testing of resistance in important crops; bioassay of plant extracts of susceptible/resistant varieties; demonstration of antibiosis, tolerance and antixenosis.

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