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Horticulture Principles and Practices

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8.20 COMMON GREENHOUSE DISEASES 276<br />

8.21 CONTROL METHODS 277<br />

8.22 CONTROL STRATEGIES 278<br />

8.23 PREVENTING GREENHOUSE DISEASES 279<br />

Summary 280<br />

References <strong>and</strong> Suggested Reading 280<br />

Outcomes Assessment 280<br />

PART 3 PROPAGATING HORTICULTURAL PLANTS 281<br />

Chapter 9 SEXUAL PROPAGATION 283<br />

PURPOSE AND EXPECTED OUTCOMES 283<br />

OVERVIEW 283<br />

9.1 SEED FORMATION 284<br />

9.2 SEED PRODUCTION AND CERTIFICATION PROCESS 285<br />

9.3 SEED LAW 286<br />

9.4 SEED QUALITY ANALYSIS 286<br />

INDUSTRY HIGHLIGHT:BRIEF OUTLINE OF SEED TESTING 288<br />

9.5 SEED VIABILITY AND LONGEVITY 295<br />

9.6 TAGGING COMMERCIAL SEED 295<br />

9.7 PURCHASING SEED 296<br />

9.8 SEED COMPANIES 296<br />

9.9 SEED DORMANCY 296<br />

9.10 IMPROVING GERMINATION CAPACITY OF SEEDS 297<br />

9.11 SEED TREATMENT 298<br />

9.12 ENVIRONMENTAL CONDITIONS FOR SEED GERMINATION 299<br />

9.13 SEED GERMINATION AND EMERGENCE 300<br />

9.14 METHODS OF SEEDING 302<br />

9.15 SEED NURSERY ACTIVITIES 304<br />

9.16 TRANSPLANTING 308<br />

Summary 310<br />

References <strong>and</strong> Suggested Reading 311<br />

Practical Experience 311<br />

Outcomes Assessment 311<br />

Chapter 10 ASEXUAL PROPAGATION 312<br />

PURPOSE AND EXPECTED OUTCOMES 312<br />

OVERVIEW 312<br />

10.1 ADVANTAGES 313<br />

10.2 DISADVANTAGES 313<br />

10.3 ADVENTITIOUS ROOTING IN ASEXUAL PROPAGATION 314<br />

10.4 APOMIXIS 314<br />

Module 1: Cuttings 314<br />

10.5 TYPES OF CUTTINGS 314<br />

10.6 FACTORS AFFECTING ROOTING OF CUTTINGS 318<br />

10.7 TRANSPLANTING 321<br />

Summary 321<br />

Module 2: Grafting 321<br />

10.8 NATURE OF GRAFTING 321<br />

10.9 WHEN TO USE GRAFTING 322<br />

Contents<br />

xiii

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