254 



DE Meijere (J. L. F.). Welk Voedsel eet de Roek het liefst? [What 

 is the favourite Food of the Rook ?] — Tijdschr. Plantenziekten, 

 Wageningen, xxv, no. 2, March 1919, pp. 53-62. 



The conchisioii is reached that on the whole the rook must be held 

 to be a useful bird and should be protected, as is indeed required by 

 law in Holland. 



In a criticism of this paper Dr. J. Ritzema Bos differs from the 

 author on many points, but agrees that the balance must be struck 

 in favour of the rook. In certain cases, however, it is very necessary 

 that crops should be protected against this bird. 



RuGGLES (A. Gr.) & Graham (S. A.). Garden and Small Fruit Insects 

 with Notes on Spraying in general.— ilfiwnesoto Univ. Farm, St. 

 Paul, Spec. Bull. no. 29.. July 1918, 31 pp., 50 figs. [Received 

 16th April 1919.] 



The information contained in this bulletin has already been noticed 

 [see this Revietv, Ser. A, vi, p. 370]. 



Matz (J.). Diseases and Insect Pests of the Pecan. — Florida Univ. 

 Agric Expt. Sta., Gainesville, Bull. no. 147, May 1918, pp. 135-163, 

 28 figs. [Received 15th April 1919.] 



The insect pests of pecan mentioned in this bulletin have already 

 been noticed at length [see this Review, Ser. A, vi, pp. 168, 226]. 



Garman (P.). A Comparison of Several Species of Lepidoptera infest- 

 ing Peach and Apple in Maryland, with Additional Notes on the 

 Oriental Peach Moth. — Maryland Agric. Expt. Sta., College Park, 

 Bull. no. 223, October 1918, pp. 103-126, 35 figs. [Received 

 16th April 1919.] 



In consequence of many enquiries regarding Cydia (Laspeyresia) 

 molesta, Busck (oriental peach moth), it has been thought advisable 

 to make a comparison of that imported and little known pest with 

 the native, more widely distributed and better known Lepidopterous 

 pests. A table is given comparing the life-history, habits, nature 

 of injury and food-plants of C. molesta, C. p)07nonella, C. pnmivora, 

 Enarmonia pyricolana, Eucosma {Tmetocera) ocellana and Anarsia 

 lineatella, with a key differentiating the larvae, pupae and adults of 

 each species. Detailed notes on the life-history and habits of 

 C. molesta are added. 



Headlee (T. J.). Some Important Orchard Plant Lice. — New Jersey 

 Agric. Expt. Sta., New Brunswick, Bull. no. 328, 15th February 

 1918, 27 pp., 6 figs. 



The conclusions drawn from a number of experiments with insecti- 

 cides against Aphis pomi, De G., A. sorbi, Kalt., A. bakeri, Cow., and 

 SipJionaphis padi, L. {Siphocoryne avenae, F. ) are that the most practical 

 treatment is the application of winter strength lime-sulphur, with 

 the addition of 40 per cent, nicotine at the rate of 1 : 500, during 

 the stage when the buds are green. At that time the maximum num- 

 ber of Aphids will be hatched and will be killed by the nicotine, and 



