BLIGHTS OF CONIFEROUS NURSERY STOCK. 21 



just after it is removed. The roots do not die till some time after 

 the tops. The immediate cause of death is unknown. The disease 

 may be prevented by avoiding heavy, close mulches. Spraying with 

 soap-Bordeaux mixture just before the beds are mulched in the fall 

 may also be of value. 



(4) Needle diseases. — There are a number of needle -destroying 

 fungi, some of which are certain sooner or later to cause damage in 

 the nurseries in the more moist parts of the United States. They 

 have so far done little damage in our nurseries and have been little 

 studied. Spraying with Bordeaux mixture at the proper time will 

 presumably prevent damage from any of them. The proper times for 

 spraying are not yet known. The importation of European stock 

 should be discouraged, in order to avoid bringing in parasites which 

 have not yet reached this country. 



(5) Red-cedar blight. — A great deal of blight occurs in red-cedar 

 seedlings and transplants. The cause and methods of prevention 

 are unknown. Shading, watering, and frequent spraying should be 

 tested. 



o 



HINGTON : GOVERNMENT PRINTING OFFICE : 



