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 

 Effects 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 larvae 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 



