PEESENT STATUS OF THE WHITE-PINE BLISTER EUST. 



11 



diseased piiic trees and where the fungus evidently transferred 

 from the pines to the Ribes. In 1912 four cases of its occurrence 

 upon Ribes were found m as many different States. Apparently 

 the crisis with this disease is at hand and whatever measures are 

 to be taken for its thorough eradication must be well started during 

 1913 or it will become permanently established here. It has been 



found that plants of Ribes are 



reestablishing themselves where 



they were removed in 1909. 

 The disease is reported as 



having been found for the first 



time in the State of Rhode 



Island upon white pmes. 



ORIGIN OF DISEASED STOCK. 



In a previous publication ' 

 the writer stated that the white- 

 pine blister rust has been re- 

 ])orted as havmg been received 

 in this country hi white-pine 

 stock sent by J. Hems' Sons, 

 of Halstenbek, Germany; Le- 

 vavasseur & Son, of Ussy, 

 France; Barbier & Co., of Or- 

 leans, France; and E. T. Dick- 

 mson, of Chatenay, France. 



In the spring of 1912 Dr. 

 W. E. Britton, the State ento- 

 mologist of Connecticut, in- 

 formed us of the discovery of 

 this disease ui a shipment of 

 3-year-old white pines from the 

 Union Nurseries, Schaum & 

 Van Tol, of Oudenbosch, Hol- 

 land .^ This shipment, more- 

 over, entered the country imder 

 the certificate of the Phyto- 

 pathological Service of Holland. At about the same time Dr. H. T. 

 Fernald, nursery inspector and State entomologist of Massachusetts, 

 reported the discovery of the disease in stock received from Buch 

 & Hermansen, of Ilalstenbek, Germany, and submitted specunens 



Fig. 2.— a -l-ycar-olcl 

 white-piiie tree with 

 chermes causing scaly 

 bark. The chermes 

 are still present, the 

 white areas being their 

 colonies. 



Fig. 3.— a 4-year-old white- 

 pine tree with chermes 

 causing scaly bark. The 

 chermes have died out. 

 At the left and below is 

 the scar caused by some 

 mechanical injury. 



for verification of 



his identification of the fungus. 



Further, the 



1 Spaulding, Perley. The blister rust of white pine. U. S. Department of Agriculture, Bureau of Plant 

 Industry, Bulletin 206, S8 pp., 5 figs., 2 pis., 1011. 



2 Clinton, G. P. Plant diseases of Connecticut. Connecticut Agricultural Experiment Station, Report, 

 1912, p. 347-348. 



[Cir. 129] 



