XXxii PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



Worsley. The further discussion of the question was adjourned until 

 the next meeting. 



Scientific Committee, March 28, 1911. 



Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and fifteen 



members present. 



Jasminum prinuiliKum diseased. — Mr. Odell showed flowering 

 shoots of Jasminum iprimulinum, with brown patches here and there 

 upon the stems, and withered fohage above them. The cause of these 

 brown patches was Botrytis cinerea, a fungus which, while usually 

 saprophytic, is capable of attacking living tissues and causing death, 

 especially when the growths are sappy. 



Crocus Sport. — Mr. Bowles showed a deep-purple sport of Crocus 

 'President,' from the Eev. J. Jacob's garden at Whitchurch. One 

 corm had produced three flowers, the two lateral ones bearing typical 

 ' President, ' with colour and striping characteristic of that variety, the 

 middle one being the sport in question, and occurring in the same 

 sheath with the normal flowers. 



Pyronia x 'John Seden.' — Messrs. Veitch sent a fruit of this 

 interesting cross, which Mr. Worsley took for further examination. 



Rhododendron Fargesii. — A flowering shoot of this new Chinese 

 Rhododendron came from Mr. J. C. Williams, of Caerhays, Cornwall. 



Fungi parasitic on insects. — The Secretary, on behalf of Mr. Voss, 

 showed a number of specimens of white fly (Aleyrodes sp.) and scale 

 insects attacked by parasitic fungi, sent by Dr. Berger, of the U.S.A. 

 Experiment Station, Florida. In Florida, considerable success has 

 been attained in dealing with insect attacks by spraying trees mth 

 water containing spores of fungi parasitic upon the insects. The 

 fungi exhibited were Ascheronia flavocitrina on Citrus white fly, 

 A. aleurodes on white fly, Aegrita Wehheri on white fly, Sphaerostilhe 

 coccophila on Orange scale, and on San Jose scale, Verticillum hetero- 

 cladium on white fly and scale, Myriangium Duryi on San Jose scale, 

 and Ophionectria coccicola on San Jose scale. 



Botanical Certificate. — The discussion upon Mr. Worsley's motioUj 

 that a new Certificate was desirable was continued, but the Committee| 

 were of opinion that the existing Botanical Certificate and the Certifi-j 

 cate of Appreciation "covered all the purposes, at present, for which! 

 such awards were required. A resolution was therefore sent to the, 

 Council suggesting the desirability of restricting the recommendation 

 of the award of the Botanical Certificate to the Scientific Committee. 



I 



f 



Scientific Committee, April 11, 1911. || 



Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and 

 twelve members present. 



Botanical Certificate. — Mr. Bowles reported that the resolutior 

 sent to the Council regarding the Botanical Certificate had been beford 



them with the following result : — 



