135 



Leach (B. R.) & Roberts (J. W.). The Control of the Codling Moth 

 and Apple Scab in Delaware. — Trans. Peninsula Hort. Soc. \Dcla- 

 icare] 1920, pp. 14-22. (Abstract in Expt. Sta. Record, Washington, 

 B.C., xliii, no. 8, December 1920, p. 743.) 



A comparative test of dusting and spraying indicated that the dusting 

 of apples is not advisable in Delaware, since the dust does not control 

 codling moth [Cydia ponionella] or apple scab as efficiently as the spray. 

 The combination of calcium arsenate and lime-sulphur used as a spray 

 controlled the codling moth as well as lead arsenate and lime-sulphur. 

 Where calcium arsenate is used, however, hydrated lime should be 

 added to avoid inj ury to the foliage. The spray gun compared f a\'ourably 

 with the spray rod in the control of codling moth, and if operated 

 properly, good results can be secured by its use. A spraying schedule 

 is given, that is believed to be the best suited for the control of 

 codling moth and apple scab in Delaware. 



Berthelot (A.). A new Insecticide and Anti-fungoid Mixture for 

 Yines.— Rev. Vitic. Paris, li, no. 1321. 23rd October 1919, 

 pp. 266-267. (Abstract in Mthly. Bull. Agric. Intell. Plant 

 Dis., Rome, xi, no. 1, January 1920, pp. 143-144.) [Received 

 8th January 1921.1 



For the simultaneous control of insect and fungus pests on the vine, 

 and to avoid the drawbacks resulting from the use of lead, the author 

 recommends an intimate mixture of 448 parts trisodium arsenate 

 with 74'9 of copper sulphate, in a suitable volume of water. This 

 yields a fairly neutral mixture. Used in increasing doses corresponding 

 to 4, 6 and up to 8 lb. of copper arsenate per 20 gals., no scorching 

 resulted. The adhesive properties were marked. To obtain quite 

 satisfactory results against the vine moths [Clysia amhiguella and 

 Polychrosis botrana] at least two applications are needed, one on the 

 appearance of the pests and the other 8-10 days later. The strength 

 of the mixture should be at a minimum of f lb. copper arsenate per 

 2 gals, water. 



BoRzi (A.). Phtliorimaca opcrculella, a Microlepidopteron injurious 

 to Potatoes in Sicily, Italy. — Boll. Studi Inform. R. Giard. 

 Colon. Palermo, v, no. 1-2, pp. 35-38. (Abstract in Mt/ily. 

 Btdl. Agric. Intell. Plant Dis., Rome, xi, no. 1, Januarv 1920, 

 p. 147.) [Received 8th January 1921.] 



The presence of Phthorimaea operculeUa, Zell., was recentl}^ reported 

 in potato tubers grown near Palermo [R.A.E., A, vii, 426]. A 

 description of the moth is given, with notes on its biology and on 

 remedial measures for it. 



Staub (W.). The Earwig [Forficula auricular ia) as a Pest on Pear- 

 Tree Leaves in Switzerland. — Schiveiz. Ohst- n. Gartcnbau-Ztg., 

 Monsingen, no. 20, 15th October 1919, pp. 313-314, 2 figs. 

 (Abstract in Mthly. Bull. Agric. Intell. Plant Dis., Rome, xi, 

 no. 1, January 1920, p. 148!) [Received 8th January 1921.] 



The earwig, Forficula auricularia, is recorded as doing serious 

 injury to the foliage of a pear tree near Berne. 



