REPORT OF THE BOTANIST. 



LEAF SOORCII OF THE SUGAR BEET, 

 CIIERLiV, CAULIFLOWER ASD MxVFLE.* 



F. C. Stewart. 



SUMMAKY. 



In central Xew York the foliage of sugar beets, cherries, ISTor- 

 way maples and sugar maples has been scorched by excessive 

 transpiration. On Long Island cauliflower has been similarly af- 

 fected. Plants standing in dry, sandy soil have suffered most. 



With the sugar beet, the leaves blacken and die. In severe 

 cases the plant is killed outright, but generally the affected plants 

 revive and make a second growth. The affected roots are small, 

 frequently discolored, and poor in sugar. 



With the cherry, part of the foliage, often as much as three- 

 fourths, becomes brown and dead. The variety Montmorency 

 Ordinaire is the one most commonly affected. This trouble has 

 been common in the vicinity of Geneva the present season and is 

 said to have occurred in one orchard quite severely in 1898, with- 

 out, however, affecting the crop of 1899. 



With the cauliflower, the tips of young leaves turn brown, as 

 if frosted. This occurred quite commonly in eastern Long Island 

 during August, but did little damage. 



The foliage of Xorway and sugar maples is much subject to 

 injury from excessive transpiration. The leaves become light 

 brnwii or reddish brown. Nursery trees and those recently trans- 

 pliiiitcd -utTcr most, liiit hirge shade trees are not exempt. Little 

 permanent injur}' is done except to newly-set trees. 



* Reprint of Bulletin No. 162. 



