JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



2. By direct infection of the tuber in the hill through incomplete 

 covering. 



3. Direct infection after digging by the moth laying its eggs on 

 the Potatos. 



4. Indirect infection after digging by the larva finding its way 

 into the Potato from the stem. 



5. Infection in the sack or bin. 

 The remedies suggested are : — 



1. Destruction of the food plants, which include many of the 

 Solanacece, e.g. Solatium nigrum. 



2. Light trapping — the moth is easily taken at light. 



3. Destruction of infested stalks. 



4. Careful hilling. 



5. Avoidance of exposure during digging. 



6. Exposure of the Potatos to the fumes of carbon bisulphide in 

 the storeroom. 



Two other Potato pests in California are incidentally mentioned, viz. 

 flea beetle (Epitrix subcrinita, Lee), and the "yellow ground cricket " 

 ( Stcnopclmatus) . — F. J. C. 



Primula cortusoides. Anon. (Journ. Hort. p. 278 ; March 27). 



There is a large portrait of P. cortusoides var. amozna grandiflora lilacina. 

 These large-fiowered forms are generally referred to P. Sieboldi, which as 

 a species is doubtfully distinct from P. cortusoides. The varieties are 

 well recommended for open border cultivation, under which they will 

 spread into large free-flowering breadths, quite hardy and perennial, but 

 requiring a dressing of soil both in autumn and spring, otherwise the 

 points of the shoots get detached and perish on the surface of the soil. 



C. W. D. 



Primula sinensis. A. Henry (Gard. Chron. No. 800, p. 269, 

 figs. 84 and 85; 26/4/1902). -The wild form of this plant has only 

 hitherto been found in one locality, namely, in the gorges of the Yang-tse, 

 near Ichang. The wild form was introduced into cultivation by seeds 

 sent home by Mr. Pratt : its habitat and mode of growth are very different 

 from what is found in the cultivated forms. The wild plant grows on 

 ledges in limestone cliffs where there is practically no soil or moisture. 

 These ledges are often hundreds of feet in length, and when the plants 

 are in flower are strikingly beautiful. The cultivated plant was introduced 

 from Canton, but there is no history of its origin in Chinese writings. 



G. S. S. 



Pruning and Planting*, Methods of Free (U.S.A. Exp. Stn. 

 Rhode Island, p. 238 ; 1901). — Photographs of Apple trees treated as 

 follows : — 



1. Trimmed to whips and cut back to about three feet in height. 



2. Trimmed to whips with the leader left untouched. 

 Branches cut back, one half leader left. 



1. rntrimmed. 



NO. 8 is considered best, and it is recommended to leave all sound 

 roots and shorten back the tops : this helps to bring about a proper 



