258 



EXPERIMENT STATION RECORD. 



tliat large mmibers of them i)erish every year because they fail to come in 

 contact with suitable food " 



Reports by L. O. Howard on Parasite Work (pp. 94-98) ; by A. T. Speare on 

 The Fungus Diseases of the Brown-tail and the Gipsy Moths (pp. 98-101) ; and 

 by H. N. Jones on Further Studies on the Nature of the Wilt Disease of the 

 Gipsy Moth Larvte (pp. 101-105) are also included. 



Spraying for codling' moth, in ,Galloway orchard {Orcg. Agr. Col. Bui., 

 1. scr., 1911. No. J/S, pp. 56, 58). — Tests made of the comparative value of 1, 2, 

 and 3 applications of lead arsenate 1.5 : 50 are summarized in the following 

 table : 



Comparative tests of one, tivo, and three applications of lead arsenate for 



codling moth. 



Spraying for the codling moth, (Oreg. Agr. Col. Buh, 1. ser.. 1911, No. 48, 

 pp. 29, 81). — The results of tests made to determine the I'elative value of one 

 and two sprays in controlling the codling moth, in which 12-yenr-old trees were 

 sprayetl with arsenate of lead 1: 50, are summarized in the following table: 



Comparative tests of one and two applications of lead arsenate for codling moth. 



History of spraying in the Pajaro Valley, C W. Woodworth {Better Fruit, 

 5 {1911), No. 10, pp. 65-70, fig. 1). — Much of the data here presented have been 

 previously noted from another source (E. S. R., 24, p. 560). In regard to zinc 

 arsenate the author states that it has proved to be the safest of the arsenicals 

 that can be procured in the form of dry powder, though not as safe as neutral 

 lead arsenate. It is said to have been used without very serious evidence of 

 burning in orchards where dusting has been adopted instead of spraying. 



Solving the problem of the codling moth, E. P. Taylor {Better Fruit, ■'^ 

 {1911), No. 10, pp. 77-80). — The author considers the unusually large percent- 

 age of wormy fruit in the Grand Valley of Colorado in 1910 to have baen due 

 to the comparatively light crop of fruit and the superabundance of worms that 

 hibernated successfully as a result of favorable climatic conditions. In 2 un- 

 sprayed orchards examined on June IS, 97.2 per cent of the apples still upon the 

 trees in a Ben Davis orchard and 90.6 per cent in a Winesap orchard were 

 already wormy. In a third unsprayed orchard examined on July 1, 96.8 per 

 cent of the fruit still upon the trees were wormy. 



The author again (E. S. R., 18, p. 951) calls attention to the fact that the 

 number of sprays required to control the moth in an orchard will depend 

 principally upon (1) previous infestation of the orchard, (2) proximity to 



