NOTES AND ABSTRACTS. 



161 



Nov. 1910; 1 plate, 3 figs., 3 tables). — According to the authors, self- 

 boiled lime-sulphur constitutes an effective remedy against 1, the 

 peach-twig borer {Anarsia lineatella ZelL); 2, the peach-tree borer 

 [Sa7ininoidea exitiosa); 3, the scale insects; 4, the green peach aphis 

 (Myzus persicae Sulz); and 5, the black peach aphis (Aphis persicae 

 TLiger). — V . G. J. 



Peach, The Principal Insect Enemies of the. By A. L. 



Quaintance ([/.*S'.A. Dep. Agr: Year-Booh, 1905; 7 plates, 7 figs.).— 

 Much loss by insect depredations is preventible by maintaining the 

 trees in a healthy condition, fertilizing where necessary, thorough 

 pruning-out of all dead wood, removal of dying and diseased trees, 

 and careful spraying with good, well-mixed insecticides. 



This bulletin deals with all the principal enemies of the peach, and 

 gives their life-histories and methods of control. — V. G. J . 



Peaches, Spraying- for the Control of Brown-rot, Scab, and 



Curculio. By "W. M. Scott and A. L. Quaintance (U.S.A. Dep. 

 Agr., Farmers' Bull. 440; March 1911). — The value of the peaches 

 annually grown east of the Eocky Mountains is 12,000,000 to 

 16,000,000 dols., and it is estimated that the brown-rot, the result of 

 the attack of Sclerotinia fructigina is responsible for an annual loss 

 of 3,000,000 to 4,000,000 dols. The peach-scab resulting from the 

 attack of Cladosporium carpophilum is responsible for another 

 1,000,000 dols., and the plum curculio (weevil) (Constrachelus- 

 nenuphar) for a further loss of about 3,750,000 dols. The diseases 

 are described (see Abstracts in- previous issues), and are similar to the 

 troubles produced by the same fungi in Britain. The weevil is a native 

 American insect. Lead arsenate (2 lb. to 50 gals, of water) is regarded 

 as the spray least likely to injure the fruit and effective against weevils, 

 while self-boiled lime-sulphur is regarded as best against the fungi. 

 The formula 8 lb. of lime, 8 lb. of sulphur, 50 gals, of water is sug- 

 gested ; and it is said that if the mixture is not allowed to remain hot 

 in a concentrated form for any length of time, no injury will result to 

 even such delicate foliage as that of the peach. — F. J. C. 



Pear Blig^ht, Scolytus rug-ulosus as an agfent in the spread 



of Bacterial. By D. H. Jones (Phytopathology, i. 5, pp. 155-8; 

 plates). — The bark beetle, Scolytus rugulosus, has been found in both 

 healthy and diseased trees. Beetles issuing from the latter have been 

 found to carry immense numbers of the blight organism. Bacillus 

 amylovorus. The blight has been found spreading in otherwise healthy 

 trees from the vicinity of borings made by the beetle. Experimental 

 evidence is brought in support of the observations. It is recommended 

 that all dead wood should be burned instead of being allowed to lie 

 about in the orchard. — F. J. G. 



Pears, Methods of Producing" Valuable New (Jour. Soc. Nat. 



Hart. Fr. p. 596, Nov. 1911).— M. Noblot, in an address on this 



VOL. XXXVIII. M 



