214 DISEASES OF THE SWEET PEA 



more soluble, and hence may result in the 

 burning of the sweet pea foliage. How- 

 ever, it may be mixed to advantage with 

 the tobacco products. 



Careful investigations of Professor 

 Safro, Entomologist to the Kentucky To- 

 bacco Product Co., show that "Black leaf. 

 40" may be used in combination with such 

 spray chemicals as lime sulphur, arsenate 

 of lead, arsenite of zinc, and iron sulphate 

 for controlling sucking and chewing in- 

 sects and fungous diseases, the soap in this 

 case being omitted. Professor Safro's 

 work further shows that "Black leaf 40" 

 may be safely combined with Bordeaux, 

 and the desired results obtained. Profes- 

 sor Safro writes as follows: "For pur- 

 poses of spraying sweet peas, add to every 

 100 gallons of Bordeaux three-fourths of 

 a pint of 'Black leaf 40.' As far as safety 

 to the foliage is concerned, much greater 



