Plant Diseases and Insects. 89 



fiicida), a species which ranks close to the curculio in destruct- 

 iveness, and he finds that this prefers the native varieties, 

 more than 27 per cent, of the fruit being infested. Spraying 

 is of no vakie in this c^zse, and jarring to collect the beetles is 

 recommended. The infested fruit does not drop, and gathering 

 it before August i is recommended to prevent maturing the 

 larvae. 



" Miss Ormerod* in her thirteenth report describes an 

 attack by the ''pear blight beetle" of American writers, 

 {Xylebonis dispar-pyri) on plum, in some parts of England. 

 She suggests trapping by placing poles among the trees, on 

 the theory that dead or dying wood will exercise a superior 

 attraction, and then recommends burning these traps before 

 the insects mature. This is only another application of the 

 method adopted by the German foresters to protect growing 

 trees from the ravages of others of the bark borers {Scoly- 

 tidce). Badly infested trees should, of course, be cut and 

 burned. 



"Weed gives usf a description of all stages of the cherry 

 louse (yMyzus cerasi), but adds nothing to our knowledge of 

 remedies. Smith treats the same insect, J and recommends 

 kerosene emulsion or fish oil soap as destructive agents. 



''The cherry slug {Selandi'ia cerasi) has been injurious to 

 both pear and cherry in Nevada, and Hillman § recommends 

 tobacco, hellebore and buhach, all of which were tried and 

 found successful. 



"Peach insects received comparatively little attention. 

 Erwin F. Smith has given || a very complete description of 

 the peach louse (^Aphis persicce-iiiger), a new insect, and an ac- 

 count of its depredations in Virginia, Maryland, Delaware and 

 New Jersey. He discusses its habits at considerable length, 

 and thinks that much of the injury to the peach, usually 

 called the yellows, may be due to this insect. He sug- 

 gests no remedies for the underground form, but has since 

 found Tf that tobacco dug into the ground around the tree 

 is satisfactorily. The true yellows, however, is not to 



♦Report of Observations of Injurious Insects and Common Farm Pests during the year 

 18S9. London. 1890. 

 t Bull. 2. vol. i. Ohio Exp. Sta. Technical Ser. 



t Bull. 72. N. J. Exp. Sta. I Bull. 10, Nev. Exp. Sta. 



II Entomo. Amer. vi. 101-201. 1[Bull. 75, N.J. Exp. Sta. 



A. H. — 7 



