NOTES AND ABSTRACTS. 



591 



woodcuts). — This report includes observations on the Phytophthora blight 

 and remedial measures employed, with reference to the special value of 

 Bordeaux mixture ; potato-leaf curl or Macrosporium solani, M. and E. ; 

 potato bacteriosis ; potato scab (Oospora scabies) ; dry rot (Fusarium 

 oxysporum) ; and the sclerotium disease, with the treatment employed in 

 each instance. — M. C. C. 



Potato Diseases: Early Blight in Wisconsin. By J. G. 



Milward (U.S.A. Exp. Stn. Wisconsin, 2Uh Ann. Bep. 1907, p. 343; 

 figs.). — It is stated that the late blight due to Phytophthora infestans 

 is practically unknown in the State ; but that early potato blight due 

 to Altemaria solani is an important factor in determining the potato 

 crop. The disease is somewhat similar to late blight in its effects, but 

 attacks the plants at an earlier stage. Experiments in spraying with 

 Bordeaux mixture against the attacks of this pest have proved highly 

 successful, as in previous years, particularly when the treatment has 

 been coupled with good cultivation. — F. J. C. 



Potato-spraying 5 . By L. R. Jones and N. J. Geddings (U.S.A. 

 Exp. Stn. Vermont, Ann. Rep. 1906-7; pp. 334-342). The use of 

 Bordeaux mixture was followed by gains varying from 26 per cent, to 

 215 per cent., the greatest gain, as a rule, following the most frequent 

 applications. The early blight (Altemaria solani) did considerable 

 mischief ; the late blight (Phytophthora infestans) did not appear. 

 Comparative trials were made with some proprietary mixtures in 

 comparison with Bordeaux arsenical mixture greatly in favour of the 

 latter.— F. J. C. 



PotatOS in Ohio. By W. J. Green and C. W. Waid (U.S.A. 

 Exp. Stn. Ohio, Bull. 174; April 1906 ; figs.). — A list of potatos grown 

 at the experiment station with descriptions and yields. It is shown 

 that some varieties are to a certain extent disease-resistant (not disease- 

 proof). Spraying with Bordeaux mixture against the potato disease 

 caused by Phytophthora infestans resulted in a gain in the crop of from 

 8 per cent, to over 70 per cent. — F. J. C. 



Preservation of Piling 1 against Marine Wood-borers. By 



C. Stowell Smith (U.S.A. Dep. Agr., Forest Service, Circ. 128).— To those 

 who have to do with various timbers in connection with wharves and other 

 marine structures a careful perusal of this excellent little work will be of 

 both interest and value. Marine wood-borers do a great amount of damage 

 to piles and buildings, with the result that the lasting properties of such are 

 considerably shortened. The methods here recommended, though simple, 

 would appear, from statistics that have been compiled, to have been most 

 efficient.— A D. W. 



Preservative Treatment of Arbor-vitae Poles, The seasoning- 



and. By C. Stowell Smith (U.S.A. Dept. Agr., Forest Service, Circ. 136). 

 — An account of the treatment of arbor-vitae timber, which, on account of 

 its strength, lightness, form, and durability, is the most desirable for 

 telephone and telegraph work of any species found within the United 



