40 EXPEEIMENT STATION KECOED. [Vol.35 



The addition of arsenate of lead to lime-sulphur appears to increase the fungi- 

 cidal value of the resulting spray, but its addition to Bordeaux does not in- 

 crease the fungicidal value of the mixture. In combination with lime-sulphur 

 solution the neutral arsenate of lead produced a spray which was more efficient 

 and safer to use than those arsenates of lead higher in arsenic oxid. The 

 various classes of arsenate of lead when used in combination with Bordeaux 

 showed no important differences in the control of diseases, insects, or injuries to 

 the fruit. 



A number of new sprays were tested both as fungicides and as insecticides. 

 Among these it is believed that copper ferrocyanid is worthy of further inves- 

 tigation as a fungicide. The results thus far obtained do not warrant its use 

 except in an experimental way. Copper ferrocyanid failed to show any decided 

 qualities as a poison spray. 



With reference to the application of summer sprays in general the work as 

 a whole shows that the first three summer sprays are most useful in improving 

 the grade and quality of the fruit by controlling the majority of the insects and 

 fungi. None of these sprays can be omitted safely. The addition of the fourth 

 and fifth sprays assisted in controlling late-brood codling moth and injury 

 from curculio. A thin but complete coating of the fruit and foliage with Bor- 

 deaux-arsenate of lead is more desirable than a heavy coat, except in cases 

 where special protection from curculio is necessary. 



Varieties of apples in Ohio, W. J. Gkeen, P, Thayer, and J. B. Keel (Ohio 

 Sta. Bui. 290 {1915), pp. 31-184, figs. 22).— This bulletin contains full horticul- 

 tural descriptions of the important new or little-known varieties of apples, 

 together with briefer descriptions of the well-known varieties and those of 

 minor importance. 



A table showing the disease susceptibility of varieties of apples, prepared 

 by A. D. Selby and others, is given, together M'ith tables showing the adapta- 

 tion of varieties to sections of Ohio and the quality in different varieties of 

 apples for specific uses. 



Water-core of the King David apple, J. B, Keil {Mo. Bui. Ohio Sta., 1 

 {1916), No. 4, pp. Ill, 118, fig. 1). — In this article the author briefly discusses 

 the tendency of certain varieties of apples to form water-core through the 

 accumulation of excess sap in the tissues surrounding the fibro-vascular bundles 

 or core lines. Preliminary tests of a number of varieties including the Wine- 

 sap, Delicious, Kinnard, and Stayman Winesap indicate that where the water- 

 core is not too severe the excess of sap is again distributed to the surrounding 

 tissues in the ripening process. Recovery seems to be less prevalent in King 

 David than in any other variety tested, the water-core specimens becoming 

 inedible and subject to early decay. 



The results of storage tests with King David conducted in 1914 and in 1915 

 indicate that if this variety is picked with a moderately good color before the 

 water-core develops it may remain either in cold storge or cellar storage for 

 several months without developing water-core. In the tests here reported apples 

 stored about October 12 developed no water-core in storage, whereas with 

 apples stored on October 23 an average of only 31 per cent of the apples was 

 free from water-core. 



Peach precooling, E. Smith {Agr. Gaz. Canada, 3 {1916), No. 2, pp. 121-123, 

 figs. 2). — In some experiments conducted by the Canadian Department of Agri- 

 culture precooled peaches were placed in two experimental cars which were 

 iced with crushed ice and 5 per cent of salt in place of block ice without salt, 

 as is the ordinary practice of icing. The results were satisfactory, the tempera- 

 tures ranging from 30 to 40° F. during an 8-day trip, thus giving better tempera- 

 tures than are ordinarily secured in block ice cars. There was no evidence of 



