238 EXPERIMENT STATION" RECORD. [Vol.43 



Profitable apples for market {Min. Agr. and Fisheries [Londnn'l, Leaflet 

 IS-'f, rev. {1920), pp. 7).- — Descriptions are given of tile cliief varieties of apples 

 which succeed in most locations in England, together with brief cultural notes. 



Factors influencing the keeping qualities of apples and pears, E. L. Oveb- 

 HOLSER (West. Fruit Jobber, 7 {1920), No. 1, pp. 21-25). — A contribution from 

 the University of California, comprising an enumeration with brief discussion 

 of various factors influencing the keeping qualities of apples and pears. 



A summary of the results obtained in selecting and propagating Paradise 

 stock, R. G. Hatton {East Mailing. Eng.: Wye Gol. Fruit Expt. Sta., 1919. pp. 

 15, pis. 8). — Work conducted at the Fruit Experiment Station of Wye College, 

 East Mailing, has shown the existence of a wide range of root systems of very 

 different vigor and desirability that are generally classed as Paradise stock. 

 In part 1 of this paper the various types observed are classified and described 

 and discussed with reference to their relative merits. In part 2 the results are 

 given of experiments in methods of propagating the most desirable types of 

 I'aradise stock. 



Experimental dusting and spraying of peaches for 1919, W. W. Chase 

 {Ga. State Bd. Ent. Circ. SO {1920), pp. 13). — Comparative dusting and spraying 

 experiments were conducted near Fort Valley, Ga., in 1919 by the State Board 

 of Entomology on a plat of about 1,200 8-year-old Elberta trees. The data se- 

 cured are tabulated and discussed, and suggestions are given to growers rela- 

 tive to the principal factors responsible for unsuccessful results in commercial 

 dusting operations during 1919. 



The data secured from the spraying tests showed that dust mixtures of 

 sulpbur-lead arsenate in the right proportion effect as good control of brown 

 rot as spraying with a convbined insecticide and fungicide in water. They were 

 far superior to the liquid spray in scab prevention. Dust mixtures were not so 

 effective as spray in controlling curculio in varieties that ripen as late as the 

 Elberta, but the spray was also unsatisfactory in this respect. 



The comparative weakness of dust against curculio is considered to be the 

 present principal drawback of the method. In this connection, it is pointed out 

 that curculio was unusually prevalent in 1919. Dusting was done only three 

 times, and it is suggested that when curculio is abundant a fourth application 

 not longer than two weeks before harvest might effect better control. A mixture 

 containing 5 per cent lead arsenate gave about the same effectiveness against 

 curculio as mixtures containing twice that quantity. 



Experimental work is to be continued with the view of developing a spraying 

 fornuUa and schedule better adapted for curculio control. 



The principal parasites of the peach, W. W. Chase {Ga. Bd. Ent. Bui. 57 

 {1920), pp. 45, pis. 11). — A revised edition of Bulletin 43 of this series (E. S. R., 

 35, p. 447). 



Fig cuttings and their proper preparation and treatment, I. J. Condit 

 {Fig and Olive Jonr., /, {1920), No. 8, pp. 11, 12). — A contribution from the 

 Forkuer (Cal.) Fig Experiment Station. It comprises a discussion of some of 

 the points essential for success in growing fig cuttings. 



Caprifigs and caprification, I. J. Condit {California Sta. Bui. 319 {1920), pp. 

 3^1-375, figs. 23). — This bulletin presents the latest information relative to the 

 caprification of Smyrna figs in California. The history of caprification in Call-, 

 fornia is briefly sketched, and the fig fruit and its structure, the classes of figs, 

 the seasonal crops of the capri fig trees, together with the life history and habits 

 of the fig wasp {Blastophaga grossornm) are considered in detail. The author 

 then discusses methods of caprification, varieties of capri figs, effects of capri- 

 fication upon different varieties of figs, the caprification of common figs, and 

 the cost of caprification. Analyses of caprifled and uncaprified figs are included. 



