THE PLANT WORLD. Ill 



The commercial growing of carnations, which has assumed large 

 proportions in this country within the last few years, has received a 

 serious check on account of a very destructive disease known generally 

 as bacteriosis from the fact that bacteria were supposed to be the 

 cause. The subject has been under investigation for some time by 

 Mr. Albert F. Woods of the Department of Agriculture, and the re- 

 sults of his study has just been published as Bulletin 19 of the Divi- 

 sion of Vegetable Physioloo-y and Patholoo-v. He concludes that, 

 while bacteria are often present in the diseased areas, they have noth- 

 ing to do with the real causation of the trouble, which results from 

 the punctures made by aphids, thrips and red-spiders. It is believed 

 that the insect injects some irritating substance of an acid nature into 

 wound, and that this substance inteferes with the nutrition of the cells 

 by destroying the chlorophyll. Mr. Woods })r()poses the name of 

 Stigmonose for this disease. 



"Practical Tree Planting in Operation'' is the title of a recent 

 bulletin by Prof. J. \V. Toumey, issued by the Division of Forestry, 

 Department of Agriculture. In July, 1899, the Division of Forestry 

 issued a circular describing a plan of cooperation by which practical 

 assistance was offered to persons desiring to establish woodlots, shelter 

 belts, wind-breaks and other plantations of forest trees. Under the 

 provisions of this circular the Division of Forestry offered to send ex- 

 pert tree planters to examine the land and prepare a plan for planting. 

 Thirty-three working plans of this kind have been prepared and the 

 present Bulletin gives the results attained, or rather outlined, as well 

 as much valuable information regarding what has been accomplished 

 during the past few years along these lines. This Bulletin should be 

 in the hands of all residents cf the vast treeless reoion of the West, 

 where much may be done, when intelligently undertaken, to provide a 

 forest covering. The Bulletin is illustrated by numerous plates show- 

 ing successful and unsuccessful results. 



