142 EXPERIMENT STATION EECORD. 



Concerning the principal diseases and enemies of the vine, J. Perraud (Prog. 

 Agr. et Vit., 26 {1896), Nos. 27, pp. 11-16; 28, pp. 48-50; 30, pp. 105-107; SI, pp. 123-132; 34, 

 pp. 207-2 12, jig 8. 50). — Ilhistrated descriptive notes are given of the principal insect 

 and fungus enemies of the grape, with suggestions for their prevention. 



Concerning the nature, appearance, and method of entering the host of the 

 pine rust, J. Eriksson {Centhl. Bakt. und Par. JUg., 2 (1896), No. 12, pp. 377-394). 



A poplar disease in -western France, P. Dangeakd (Le Botaniste, 5 {1896), pp. 

 38-43). — A preliminary note is given on a disease of poplar trees. 



The bacterial diseases of plants, E. F. Smith {Amer. Nat., SO {1896), Nos. 356, pp. 

 626-643; 357, pp. 716-731; 358, pp. 796-804).— K critical review is given of the present 

 state of our knowledge relating to bacterial diseases of plants. 



ENTOMOLOGY. 



The Mexican cotton boll weevil, L. O. Howard (U. S. Bept. 

 Agr.., Division of Entomology Circular 14, 2d ser,, pp. 8, Jigs. 5). — This 

 circular is a revision of Circular 6 (E. S. E.., 7, p. 312) giving the results 

 of supi)lementary investigation of Anihonomus grandis. The general 

 appearance, life history, and habits are reviewed, and a map is given 

 showing the localities at which the insect occurred in Texas in 1895. 

 As a remedy trapping the weevils in the spring by planting a few early 

 cotton plants which the weevils will attack before the balk of the crop 

 has developed bolls and in which they may be found and destroyed 

 is suggested. As further treatment of the pest is suggested destroy- 

 ing the entire cotton crop in the infested region by burning it during 

 the fall. This should be gradually done, so that weevils escaping at 

 first may be destroyed later. In addition, clean cultivation is urged to 

 prevent hiding places for the weevils. 



The pear psylla and the New York plum scale, M. V. Slinger- 

 LAND [New York Cornell Sta. Bui. 108, pp. 69-86, Jigs. §).— This bulletin 

 consists of the matter contained in Bulletins 44 (E. S. E.., 4, p, 472) 

 and 83 (E. S. R., 6, p. 1004) of the station, with recently discovered 

 facts concerning the life history and treatment of the insects. 



The pear psylla (pj). 69-81). — The different stages and the life history 

 of Psylla pyrieola are described, and the pest is stated to have a dis- 

 tribution ranging from Maine to Virginia, and as far west as the Missis- 

 sippi River. In the Northern States there are 4 annual broods, while 

 in Maryland there are 5. Two predaceous insects have been found 

 feeding upon the jisyllas in great numbers, a lacewing fly {Chrysopa 

 oculata) and the red ladybird {Adalia Mpunctata). Spraying with 

 kerosene emulsion is recommended as the most efficient treatment 

 against both nymphs and adults, and successful experiments with this 

 insecticide by a New York orchardist are quoted. 



The New York plum scale (pp. 81-86). — The damage to New York 

 orchards in 1894, as described in Bulletin S3, was greater than then 

 supposed; but about 75 per cent of the scales were killed by the winter 

 of 1894-'95. This decrease in the numbers of the scales, vigorous 

 spraying with kerosene emulsion, and attacks on the scales by parasites 



