110 PARASITES BELONGING TO THE GENUS GLOMEEELLA. 



Plate XIII. Glomerella cingulata from Persea. Seven tubes from conidial generation 

 17, derived from generation 16, tube c, which produced chiefly acervuli. These 

 cultures all produced, chiefly perithecia which were arranged in dense, scattered 

 black masses, instead of being separate and evenly distributed, as in most cases of 

 the preceding generations. Compare Plate IX. 



Plate XIV. Glomerella cingulata from Persea. Two plates poured from conidial gen- 

 eration 9, tube a. Conidia were numerous at first in both plates, but were scat- 

 tered, and no conspicuous acervuli seen. Only one colony, a, produced distinct 

 and conspicuous acervuli. The rest of the colonies were chiefly perithecia. 

 Compare Plate IX, tube 9 a. 



Plate XV. Glomerella cingulata from Persea. Plates 10 days old made from crushed 

 perithecia and ascospores. The irregular, scattered, large, dark bodies, a, are 

 colonies of acervuli. The other colonies are chiefly perithecia. This strain of the 

 fungus originated from a single conidium. A greater development of perithecia 

 is observed along lines of contact between the conidial and perithecial colonies. 



Plate XVI. Willow Twig apples inoculated with conidia of Glomerella cingulata from 

 4 different hosts. Figures 1 and 2 inoculated with conidia from an apple; figures 

 3 and 4, from a lemon; figures 5 and 6, from grapes; figures 7 and 8, from a fig. 

 The strain of the fungus from the apple showed less virulence in this instance than 

 that obtained from other hosts. All were inoculated at the same time, in the same 

 manner, and kept under the same conditions. 



Plate XVII. Eight figs 13 days after inoculation with conidia of Glomerella cingulata 

 obtained from a rubber plant. The four upper fruits were inoculated by punc- 

 ture; the four lower by surface application. All except two of those inoculated 

 on the surface developed the common Glomerella rot of the fig. 



Plate XVIII. Watermelon inoculated with conidia of Glomerella cingulata obtained 

 from guava. The decayed area is practically covered with large acervuli. 

 252 



ADDITIONAL COPIES of this publication 

 il may be procured from the Supebintend- 

 ent of Documents, Government Printing 

 Office, Washington, D. C, at 20 cents per copy 



