382 AMERICAN GRAPE CULTURE. 



is held in a circular tin box, which forms a 

 part of the nozzle, the arrangement of which is 

 shown on a larger scale. Still another form is 

 shown in Fig. 151. In this the sulphur is 

 forced through the nozzle by wind generated 

 by a fan- wheel. The first bellows is much the 

 simplest, and answers the purpose well, ena- 

 bling one to apply the sulphur rapidly, and in 

 a very thorough manner 



Fig. 151. 



But sulphur is best applied as a preventive 

 rather than a cure ; for if the disease is allowed 

 to become firmly established, it is exceedingly 

 difficult to eradicate. The proper course, there- 

 fore, is to apply the sulphur thoroughly to all 

 parts of the vine early in the spring when vege- 

 tation begins : many gardeners apply it in the 

 grapery as soon as the vines are pruned in the 

 fall. It should be applied again in June, or as 

 often as we have reason to apprehend such 



