TAMING THE WILD BLUEBERRY 



139 



A THREE-YEAR-OLD BLUEBERRY PLANT IN BLOOM 



neither insect trap nor root bacteria. 

 The microscopical examination of the 

 plant, however, disclosed the presence of 

 a fungus growing partly outside and 

 partly inside the epidermal cells of the 



root. The fungus is exceedingly minute, 

 the threads of which it is composed hav- 

 ing a diameter of 0.00006 to 0.00012 of 

 an inch. The fungus occurs in great 

 abundance on the roots of vigorous 



