ENTOMOLOGY. 765 



Spraying potatoes on Long Island in the season of 1896, F. C. 



Stewart (New York Stale Sta. Bui. 123, pp. 234-259, pi. 1). — The 

 author reports upon experiments conducted at Floral Park and Mast 

 Willistou, Long - Island, for the prevention of potato diseases. While all 

 the potatoes were unusually free from disease during the season, yet 

 the sprayed plats showed a considerably increased yield over those not 

 receiving any application of fungicide. The total expense of spraying 

 5 times is estimated at $4 per acre. Estimating the potatoes to be 

 worth 25 cts. per bushel, the increasing yield, with the exception of the 

 plat of Victor Eose potatoes, more than paid for the application. 



Fungiroid and '"Lion Brand" Bordeaux mixture were tested and 

 found to be much inferior to Bordeaux mixture as ordinarily prepared, 

 and are not to be recommended. The insecticidal value of Bordeaux 

 mixture was apparent, but the author thinks that Paris green should 

 be used in connection with the fungicide in spraying potatoes. A com- 

 parison was made of different strengths of Bordeaux mixture and the 

 1:11 formula gave slightly better results than the 1:7 mixture. A 

 comparison was also made in which plants were sprayed 5 times with 

 Bordeaux mixture at the rate of 100 gal. and others at the rate of r>0 

 gal. per acre. The increased yield where the greater amount of fungi- 

 cide was used more than paid for the additional expense. 



Black rot and grape stocks, E. Ratoin {Rev. Sei. ; '. ser., 189\ . \". W, pp. 

 786-788). — The author cites the resistance of certain varieties to phylloxera and to 

 anthracnose, and mentions the difference in susceptibility of different varieties to 

 black rot. Investigations alony the line of resistant varieties is thought promising. 



A general review of the investigations on the grain rusts of Sweden, .J. 

 Eriksson {Hot. Centbl., 72 {1897), Xo*. 10, pp. 321-325; 11, pp. 354-362).— The sub- 

 stance of this article has been given elsewhere (see p. 760). 



On the prevention of grape mildew (Ztsehr. Pflanzenkrank., ? {1897), \<>. ■', 

 p. 312). — A brief note is given on the beneficial use of copper sucrate and sulphur 

 for the prevention of grape mildew. 



Does it pay to spray potatoes? F. H. Hall (Xeiv York Slate Sta. Bui. 7??. popular 

 ed., pp. 6). — A popular edition of Bulletin 123 of the station (see above . 



Preventive treatment of raspberry anthracnose, V. II. Hall (Arte York State Sta. 

 Bui. 124, popular ed., pp. 5, fig. 1). — This is a popular edition of a more technical 

 bulletin of the same number (see p. 762). 



ENTOMOLOGY. 



The California vine hopper, E. W. Hilgard (California Sta. Bui. 

 116, pp. 14, Jigs. 4). — Though not so seriously injurious as the Anaheim 

 disease or the phylloxera, the vine hopper is thought of great importance 

 on account of its wide distribution and the absence of any thoroughly 

 good remedy. The lack of a remedy for this insect is accounted for by 

 the peculiarities of its life history. In California in the winter, for 

 instance, the egg state is passed in the ground; nor does the adult 

 insect winter where it may be readily attacked. At that season it leads 

 a somewhat active life, feeding on everything that remains green. The 

 insects begin to increase in the spring and are ready for the vines as 



