i82 DISEASES OF THE SWEET PEA 



however, the minute young blossoms fail 

 to develop, and drop off while very young. 



This form of drop is attributed to an 

 unbalanced condition of food elements in 

 the soil. This may occur in a soil that has 

 been excessively fed or in a soil that is 

 lacking in plant food. Bud drop has ac- 

 tually been found in the laboratory on 

 sweet pea plants grown in pots which re- 

 ceived heavy applications of manure, and 

 in pots filled with a very poor clay soil. 

 The trouble has been overcome by the ap- 

 plication of 150 lb. of muriate of potash 

 and 600 lb. of acid phosphate per acre. 

 As a result of this treatment the drop 

 ceased within a week, and a luxuriant crop 

 of flowers was produced. An application 

 of a balanced fertilizer to the pots above 

 mentioned readily helped the plants to 

 overcome the drop. 



Root Burn. This trouble, probably, is 



