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Contents
Chapter 1 General ……………………………………………………………… 1
Section 1 Economic Significance of Pear Cultivation ………………………… 1
Section 2 History and Current Situation of Pear Cultivation ………………… 1
Section 3 Problems and Developing Trends in Pear Production ……………… 2
Chapter 2 Superior Cultivars ………………………………………………… 5
Section 1 Classification of Pears Cultivated in China ………………………… 5
Section 2 Superior Cultivars ………………………………………………… 6
Section 3 Cultivar Selection ………………………………………………… 25
Chapter 3 Growth and Fruiting Habits …………………………………… 27
Section 1 Characteristics of Roots ………………………………………… 27
Section 2 Characteristics of Buds, Branches, and Leaves ………………… 34
Section 3 Flower Bud Diff erentiation ……………………………………… 44
Section 4 Flowering and Fruiting ………………………………………… 46
Section 5 Development of Fruits …………………………………………… 48
Section 6 Requirements for Environmental Conditions …………………… 49
Chapter 4 Nursery Techniques …………………………………………… 53
Section 1 Types and Selection of Rootstock ……………………………… 53
Section 2 Nursery Techniques …………………………………………… 56
Section 3 Breeding of Dwarfing and Virus-free Seedlings ………………… 69
Section 4 Top Grafting for Growing Superior Cultivars …………………… 70
Chapter 5 Orchard Construction Techniques …………………………… 73
Section 1 Selections of Orchard Land ……………………………………… 73
Section 2 Orchard Planning and Setting …………………………………… 77
Section 3 Planting of Pear ………………………………………………… 84
Chapter 6 Nutrient, Soil, Fertilizer, and Water Management Techniques
for Pear Trees ………………………………………………… 89
Section 1 Nutrient Elements for Pear Trees ………………………………… 89
Section 2 Soil Management Techniques for Pear Orchard ………………… 95
Section 3 Fertilizer Requirement Characteristics of Pear Trees and
Scientific Fertilization …………………………………………… 121
Section 4 Irrigation and Drainage ………………………………………… 147
Chapter 7 Trimming and Pruning of Pear Trees ………………………… 152
Section 1 The Principle and Function of Trimming and Pruning of
Pear Trees ………………………………………………………… 152
Section 2 The Basis, Time, and Method of Trimming and Pruning for
Pear Trees ………………………………………………………… 158
Section 3 Trimming Characteristics of Pear Trees and Requirement for
High-yield Tree Shapes ………………………………………… 169
Section 4 Main Tree Shapes of Pear Trees ………………………………… 173
Section 5 Method of Pruning ……………………………………………… 180
Section 6 Innovation of Trimming and Pruning Technology for Pear Trees … 184
Chapter 8 Flower and Fruit Management ………………………………… 188
Section 1 Pollination Promotion and Fruit Setting Rate Improvement …… 188
Section 2 Frost Prevention during Anthesis ………………………………… 190
Section 3 Blossom and Fruit Thinning …………………………………… 191
Section 4 Fruit Bagging …………………………………………………… 194
Section 5 Harvesting, Packaging, and Transport of Fruits ………………… 196
Chapter 9 Top Grafting for Growing Superior Cultivars ………………… 200
Section 1 Top Grafting Period ……………………………………………… 200
Section 2 Treatment of Top Grafting Trees ………………………………… 200
Section 3 Grafting ………………………………………………………… 201
Section 4 Post-grafting Management ……………………………………… 201
Chapter 10 Integrated Control Technology for Diseases and Pests
on Pear Trees ………………………………………………… 203
Section 1 Occurrence and Infection of Diseases on Fruit Trees …………… 203
Section 2 Identification and Retrieval of Fruit Tree Diseases ……………… 214
Section 3 Identification of Fruit Tree Pests ………………………………… 226
Section 4 Scientific Control Technology for Diseases and Pests
on Fruit Trees …………………………………………………… 230
Section 5 Pear Diseases and Control ……………………………………… 256
Section 6 Pear Pests and Control …………………………………………… 274
Section 7 Physiological Diseases of Pear Trees …………………………… 315
Appendixes …………………………………………………………………… 325
References …………………………………………………………………… 352