Unit 1（A）The Concept of Disease in Plants 1
Unit 1（B）Molecular Plant Pathology 5
Unit 2（A）Genes and Disease 11
Unit 2（B）The Gene-for-Gene Concept 15
Unit 3（A）Systemic Acquired Resistance 19
Unit 3（B）Defense Through RNA Silencing by Pathogen-derived Genes 27
Unit 4（A）Integrated Control of Plant Diseases 30
Unit 4（B）New Tools in Epidemiology 37
Unit 5（A）Characteristics of Plant Pathogenic Fungi 41
Unit 5（B）Isolating the Pathogen 48
Unit 6（A）Characteristics of Plant Pathogenic Bacteria 51
Unit 6（B）Phytoplasmas and Spiroplasmas 57
Unit 7（A）Detection and Identification of Plant Viruses 61
Unit 7（B）Virus Infection and Virus Synthesis 66
Unit 8（A）Characteristics of Plant Pathogenic Nematodes 69
Unit 8（B）Root-knot Nematodes：Meloidogyne spp 74
Unit 9（A）Insect Biodiversity and Conservation 78
Unit 9（B）Reasons for the Studying of Insects 88
Unit 10（A）External Structure of Insects 94
Unit 10（B）Integument and Internal Systems of Insects 104
Unit 11（A）Embryonic and Postembryonic Development of Insects 112
Unit 11（B）Specialization of Insects 121
Unit 12（A）Behavior and Habits of Insects（1） 128
Unit 12（B）Behavior and Habits of Insects（2） 137
Unit 13（A）Environment Factors Affecting Development of Insects 143
Unit 13（B）Environment and Insects 151
Unit 14（A）Insect Systematics:Phylogeny and Classification 157
Unit 14（B）Naming,Describing and Classification of Insects 165
Unit 15（A）Detrimental Insects 173
Unit 15（B）Beneficial Insects 181
Unit 16（A）Integrated Pest Management 188
Unit 16（B）Reasons for Insects Becoming Pests and Assesment of Pest Status 197
Unit 17（A）What Is a Pesticide? 202
Unit 17（B）Generic Terms,Trade Names,and Chemical Names 208
Unit 18（A）Agriculture Formulations 211
Unit 18（B）The Formulations of Pesticides 219
Unit 19（A）Chemical Control in USA 223
Unit 19（B）Insecticides 231
Unit 20（A）Herbicides 234
Unit 20（B）Mode of Action 241
Glossary 245
English-Chinese Common Names of Pesticides 260
Kev to Exercises 270
References 288