196 Mortier F. Barrus 



successful control measures would not be lost in carrying them out. At 

 the time when the disease occurs, however, he is willing to do anything 

 to lessen its destructiveness. With bean anthracnose, as with most other 

 plant diseases, control measures to be successful must be given considera- 

 tion before the disease appears, or, better, before the crop is planted; 

 and whatever measures are decided upon must be carried out completely. 

 Frantic attempts to control the disease after it has appeared are usually a 

 waste of time and money and cannot be generally recommended. 



When one considers the various measures suggested for the control 

 of this disease, he must realize that each has disadvantages and that 

 the cost would be greater than the gain were all carried out even though 

 the disease was thereby controlled. Some measures offer a greater promise 

 of success than others. These are here summarized and briefly discussed. 



Seed disinfection may prove to be worth while, but more experimental 

 work is necessary before it can be recommended. 



The avoidance of conditions favorable to the fungus is a precautionary 

 measure that should receive consideration from all bean growers since 

 it involves little or no expense. 



Spraying is not a practicable measure for growers of dry beans in New 

 York, but frequent and thorough applications of bordeaux mixture can 

 be depended on to protect the plants from anthracnose; and such a control 

 measure is practicable when the value of the crop is sufficiently great to 

 warrant the expense involved. 



As far as present evidence indicates, the application of a fungicide to 

 the soil is impracticable and ineffective. 



Rotation of crops, in itself, will not prevent anthracnose nor reduce 

 the liability of its occurrence to any marked extent; but it is a measure 

 that should receive some consideration, since its practice may serve to 

 keep down the losses occasioned by other diseases. 



The disinfection of picked pods need be considered only by growers 

 of snap beans who ship to distant markets. This will not be necessary 

 for growers who are successful in controlling the disease in their fields. 



The use of anthracnose-resistant varieties is a satisfactory means of 

 control and should be taken advantage of when possible. 



The practice of careful hand-picking in order to remove diseased seed 

 cannot be depended upon as an effective control measure because affected 

 seed will escape the eye of the most practiced observer. However, this 



