162 



FUXGI AXD FUXGICIDES 



and no other cause for the disorganization is to be seen» 

 Not unfrequently the leaves become spotted — that is^ 

 certain areas decay and fall away. If a leaf freshly 

 affected is held toward the light, the diseased places 

 may be easily detected, by the peculiar discoloration^ 



FIG. 71. 3IUSKMEL0N LEAF SHOWING BACTERIAL BLIGHT. 



being due to the excess of moisture — a sogginess, so to 

 speak/' (Halsted.) 



Effective preventive measures for this vexatious mal- 

 ady have yet to be found. Presumably rotation of crops 

 will prove an important method, but if the same germs 

 affect many widely separated plants, a specially devised 

 rotation may be required. 



