444 AMERICAN FORESTRY 



deprived of fuel, deprived of the prod- correctly, freeze.- like a southern plant 

 ucts of the natural garden of God, must brought to the north, and those who 

 either degenerate, like the Siberian sav- are more resolute flee from their father- 

 ages, or flee from Russia. Our nation land to Siberia, Turkestan. Canada, 

 does both. It degenerates, or more Australia, Argentina." 



WHITE PINES MENACED 



THE white-pine blister rust has in Forest Pathology in the liureau of 

 such dangerous possibilities for Plant Industry, where an examination 

 the native white-pine forests of will be made, free of charge, and the 

 the East that the United States best possible advice given regarding the 

 Department of Agriculture recom- eradication of the disease. General, 

 mends earnestly that all trees found af- active cooperation of white-pine own- 

 fected by this disease be destroyed at ers will do much to make effective the 

 once. The disease is most conspicuous efforts of the Department to eradicate 

 during the month of May, and it is this serious enemy of the most impor- 

 recommended that the owners of all tant coniferous tree of the East, 

 white pines which are not definitely It is estimated that at the present 

 known to have grown from seed in time there are present in this country 

 their present location make a thorough over two and one-half million voung 

 search of their white pines for this dis- white pine trees which were infected by 

 ease. The latter part of May is the this disease before they left Europe, 

 best time to search for it in Northern and which are now present in this coun- 

 New England and New York, while the try. This disease has an alternate stage 

 first half of May is best for Southern of development upon the leaves of vari- 

 New England and New York and ous currants and gooseberries. It has 

 farther south. been found a number of times in this 

 The disease appears upon white pines country occurring upon currants. These 

 in most localities during the month of occurrences of the disease upon cur- 

 May in the form of yellow blisters rants in this country are directly trace- 

 breaking through the bark of the main able to neighboring diseased white 

 stem near the ground. These blisters, pines, as the disease is quite definitely 

 after a few days, break open and give known now not to be carried upon dor- 

 forth great numbers of dusty, orange- mant currant stock, 

 yellow spores. In rare cases it occurs Since the discovery of this disease in 

 well up on the trunk of trees which are 1909, a special effort has been made by 

 twenty to twenty-five years of age. A various forestry officials and horticul- 

 very similar disease occurs at about the tural inspectors of the Eastern States, 

 same time upon the pitch pine, but it where the infected imported trees were 

 should not be confused with the white- mostly distributed, to eradicate the dis- 

 pme blister rust, as it is a native disease ease everywhere that it might be found, 

 which does not attack the five-needled It very often occurs in ornamental 

 pines. All owners of white pines, either plantings of private estates, especially 

 in woodlots or in ornamental plantings, upon trees less than twenty-five years 

 should make a special search for the of age. The disease is one from which 

 1 dister rust of white pine on their prop- the tree never recovers, so far as now 

 erty. In case it is believed that this dis- known ; hence it is of no advantage to 

 ease is found, specimens should be for- the owner of diseased trees to refuse to 

 warded to the Office of Investigations remove and destroy the diseased trees. 





