clxxviii PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



become chrysalides within a couple of inches of the surface. I should 

 recommend that a good dressing of kainit should be given, and that it 

 should be chopped in with a hoe ; this would probably kill a number of 

 them. When the leaves are opening in the spring another dressing would 

 be useful to prevent the moths making their way to the surface." 



Warty Disease of Potatos.—'Mr. Gordon exhibited Potatos badly 

 attacked by Chrysophlyctis endobiotica (see Journ. Bd. Agr. ix. pp. 820- 

 323 ; and Journ. B.H.S. xxvii. p. 1180). This fungus was introduced 

 from the Continent, and first appeared in Cheshire. It has completely 

 destroyed crops in allotments this year in Nottinghamshire. 



Prof. M. C. Potter, in Journ. Bd. Agr. ix. p. 322, writes as follows : — 

 " As, so far, it appears to be of local occurrence, it is of the highest 

 importance to stamp it out before it obtains a firm foothold in this country. 

 This might be done by carefully sorting the Potatos and destroying those 

 attacked. These should in no case be allowed to pass out of an infected 

 district or be used for 1 seed.' It is worth taking every possible pre- 

 caution to check this parasite, which otherwise might ensure for itself a 

 wide distribution and cause very considerable damage." 



With reference to this disease Dr. Cooke, V.M.H., writes : 



" This new disease appears to have been first recognised in specimens 

 from Cheshire in 1900, afterwards to have been sent from North Wales, 

 and more recently from other localities. It attacks the tubers whilst in 

 the ground, causing warty or nodular outgrowths, either partially or 

 wholly investing the young tubers. Just beneath the surface of these 

 protuberances, the outer layers are filled with nearly globose dark brown 

 sporangia, about 60 to 70 by 50//,. 



u It has been assumed that this fungus is the same as was described 

 under the name of Chrysophlyctis endobiotica by Schilbersky (Ber. d. 

 Deut. Bot. Ges. xiv., 1896), but no figures or measurements were 

 included in the original description. 



" A similar disease attacked Beetroot in the grounds of the School of 

 Agriculture at Rouiba (Algiers), and this Trabut examined in 1894, and 

 described under the name of (Edomyces leproides. This was afterwards 

 examined by Dr. Magnus, of Berlin, and he applied to it the name of 

 Urophlyctis leproides. At any rate, it is quite certain that Dr. Magnus 

 was acquainted with the Beetroot tumour, and we are assured that upon 

 his examination of specimens of this warty Potato disease, sent to him 

 from this country, he has pronounced it to be identical with the Beetroot 

 tumour, and therefore should be called (Edomyces leproides. No one 

 could call in question the authority of so old and experienced a mycologist 

 as Dr. Magnus ; and when it is taken into account that he has personally 

 been made acquainted with both forms of disease, on Beetroot and on 

 Potato, it is rather presumptuous, without better evidence than a descrip- 

 tion without figures or measurements, to call in question his decision. 

 At present, therefore, we are content to accept the view adopted by Dr. 

 Magnus, that the Beetroot tumour and the warty Potato disease are pro- 

 duced by the same fungus, for which the accepted designation is 

 (Edomyces leproides. 



" Of one thing we may be quite certain, that this threatens to become a 

 troublesome disease unless heroic measures are undertaken to stamp it 



