XXvi PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



cause of the club-root disease in turnips, cabbages, and all plants of the 

 cabbage family. 



Mildewed Apple Shoots. — Apple shoots were received from Gloucester- 

 shire badly attacked by the mildew Sphaerotheca Mali, a trouble that 

 appears to be spreading (see Journal R.H.S. vol. xxvi. p. 736, vol. 

 xxviii. p. 2). Other diseased twigs from Falmouth were taken by Mr. 

 Massee for further examination. 



Apples spotted. — Mr. Hooper showed several ' Cox's Orange Pippins ' 

 spotted, which Mr. Massee took for further examination. 



Gooseberry Caterpillars. — Some soil from under gooseberry bushes 

 was received, and Mr. Saunders undertook to examine it in order to 

 discover whether any chrysalids of the gooseberry sawfly were present or 

 not. 



Scientific Committee, February 12, 1907. 



The late Dr. M. T. MASTERS, F.L.S., in the Chair, and thirteen other 

 members present, and T. S. Sims, Esq., of Natal, and J. Burtt-Davy, 

 Esq., of the Department of Agriculture, Transvaal, visitors. 



Caterpillars on Gooseberries. — Mr. G. S. Saunders, F.L.S., reported 

 that he had examined the soil from under gooseberry bushes sent to the 

 last meeting, and had found no cocoons of the gooseberry sawfly ; he there- 

 fore concluded that the caterpillars which had attacked the bushes were 

 those of the " magpie moth," which do not pupate in the ground, " but in 

 leaves which it attaches to the stem by threads, or in a light cocoon 

 fastened to the stem under dead leaves, rubbish, &c. on the ground or on 

 walls kc. These should be searched for and destroyed. Any leaves 

 which hang on the bushes after the others have fallen should be collected 

 and burnt, and the dead leaves, rubbish, kc. under the bushes should 

 be treated in the same manner ; taking up the earth under the trees will 

 be of no avail if the sample submitted was an average one." 



Apple Twigs diseased. — Mr. Massee, V.M.H., reported that the apple 

 twigs from Falmouth showed the presence of canker, Nectria ditissima. 

 He recommended that similar appearances on other twigs should be 

 removed and " green fly " Sec. should be kept down, as they distribute the 

 fungus and also cause wounds through which it gains an entrance. 

 Referring to other twigs shown at the last meeting attacked by Sphaero- 

 theca Mali, he said " diseased shoots should be cut off, as the mycelium 

 hibernates in the bark and appears year after year. Good drainage 

 checks the development of the parasite." 



Apples spotted.— Mr. Massee also reported that the pitting and 

 internal discoloration of the apples shown at the last meeting by Mr. 

 Hooper were due to the exceptional heat of last season, and were not in 

 any way influenced by fungi or insects. 



Oypripedkm malformed. — Referring to the Cypripedium shown at 

 the last meeting, Mr. Worsdell, F.L.S., wrote : - u It is l case of fasciation 

 two flowers being concerned in the make-up of the whole. Taking the 

 large flower first, the whole has become twisted out of the ordinary 

 position, duo to the untwisting of the ovary. Tho sepals are normal, but 



