Historical overview of host plant resistance; Crop plant and insect diversity; Secondary plant metabolites for insect resistance; Insect - plant interactions; Host plant selection; Mechanisms of resistance; Factors affecting expression of resistance; Screening for insect resistance; Plant resistance and insect pest management; Genetics of resistance to insects; Breeding for resistance to insects.

Contributed articles.

Introduction; Insect-plant interaction; Host-plant selection in Phytophagous insects; Mechanisms of resistance; Biochemistry of resistance; Factors affecting expression of resistance; Resistance programme; Genetics of resistance; Plant resistance in pest management.

What is plant resistance to insects? How is plant resistance to insects obtained? How can plant resistance to insects be utilized?

Plant resistance to insects. Types and classification of resistance. Biochemical and morphological bases of resistance. Genetic factors affecting expession and stability of resistance. Environmental factors influencing the magnitude and expression of resistance. Insect behavior and plant resistance. Insects and plant pathogens. The pathosystem concept. The problem of variable pests. The use of plant incect models. Resistant varieties in pest management systems. Germplasm resources and needs. Breeding systems for resistance breeding for resistance in specific crops. Breeding approches in alfalfa. Breeding approaches in cassava. Breeding cotton for resistance to insect pests. Breeding approaches in rice. Breeding sorghums resistant to insects. Breeding forest trees resistance to insects. Breeding approaches in wheat. Future opportunities and directions.