Contents 



XV 



CHAPTER XXI 

 THE SOURCES OF NECTAR AND POLLEN 



Reasons for knowledge of nectar sources — Difficulties of 

 identification — Study of neighboring locations — Function 

 of nectar — Variations in nectar — Variations in secretion 

 — Eflects of climatic conditions on secretion — Advantages 

 of swamp sources — Cultivation of plants for nectar — Value 

 of the minor sources — Gathering of pollen — Value of bees 

 in cross-pollination — Damaging effects of incorrect spray- 

 ing — Bees do not puncture ripe fruit — Supposedly poison- 

 ous honeys — Plant honey-dews — Insect honey-dew — 

 Annotated list of honey-plants 



359-396 



CHAPTER XXII 

 BEE DISEASES AND ENEMIES 



Brood diseases — -American foul brood — European foul 

 brood — Sacbrood or pickled brood — Methods of spread — 

 Treatment — Shaking treatment — • Fall treatment — Addi- 

 tional treatment for European foul brood — Diseases of 

 adult bees — Dysentery — Nosema disease — Paralysis — 

 Spring dwindling — Enemies of bees — The wax-moth {Gal- 

 leria mellonella) — The lesser wax-moth {Achroia grissella) 



■ Remedies — Other enemies 



397-416 



CHAPTER XXIII 

 THE REARING OF QUEENS 



Commercial queen-rearing — Systematic requeening — 

 Conditions under which queens are reared — Saving natural 

 queen cells — Having natural cells built — Miller method 



— Alley method — Hopkins method — Queen cells on 

 artificial bases — Transferring larvse — ■ Swarm box — 

 Having cells built out — Nursery cages — Mating hives — 

 Classification of queens — Mailing cages — Introducing 

 queens — Improvement of stock — Study of breeding needed 



— Selection of drones — Desirability of pure races — 

 Danger from inbreeding 417-429 



