118 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



In my experience, parsley has not so far been very frequently or 

 seriously attacked in this country. We have a single specimen col- 

 lected in our own garden at Broomfield, Essex, in 1906, and there is 

 one collected by Mr. D. A. Boyd " on fading leaves of Petroselinum 

 sativum," at Seamill, Ayrshire, in June 1897, in the British Museum 

 herbarium, and these are the only definite records of the disease in this 

 country we have been able to discover. 



Distribution of the Fungus on Celery. — It was not until 1890 that 

 Bbiosi and 0 a vara* drew attention to the disease on celery in the Orto 

 di Pavia, and published specimens with a description and figure of the 

 fungus. In 1891, HalsteadI mentions the occurrence of the disease 

 in N. America, and F. D. Chester found it in the same year on the 

 leaves of cultivated celery at Newark, Delaware. | 



Numerous references to the occurrence of the disease in various 

 parts of Germany, where it seems first to have attracted attention in 

 1895, are quoted in Klebahn's very full paper, § which shows the disease 

 to be very widespread in that country; it does not appear to have 

 assumed serious proportions in Germany prior to 1896, for Frank, || 

 whose book on plant-diseases was published in that year, merely 

 mentions the occurrence of Septoria petroselini on parsley; but Sorauer, 

 who published a short note on the disease in 1896,11 says in 1909 ; 

 " Die Blatter der Petersilie werden von Septoria Petroselini Desm. 

 heimgesucht. Schadlicher als der Typus wirkt eine Varietat Apii Br. 

 efe Cav. die nicht bloss in Europa, sondern auch in Nordamerika den 

 Selleriekulturen erheblichen Schaden zufiigt." It is evident therefore 

 that the disease had in the few years after its introduction into Germany 

 spread to a very serious extent, as, indeed, Klebahn indicates.** In 

 N. America it is well-known and frequently extremely troublesome, f f 

 It is also known in Italy, i| Norway, §§ Belgium, |||| Denmark, 

 France, nil 



* I.e. ante, No. 144. 



t Halstead, U.S.A. Exp. Stn., New Jersey, Report 1891, p. 256. 

 t Chester, F. D., I.e. ; Ellis and Everhart, Exsicc. North American Fungi, 

 No. 2845. 



§ Klebahn, H., I.e., p. 1. 



II Frank, A. B., Die Pilzparasitaren Krankheiten der Pflanzen, p. 429. 

 n Sorauer, P., I.e. 



** Sorauer, P., Handbuch der Pflanzenkrankheiten, II. p. 410. 



tt In addition to the specimen collected by Chester referred to above, there 

 are others in the Natural History Museum herbarium from a hothouse in the 

 Massachusetts Agr. College, Amherst, collected in November 1895, and from 

 Greenville, New Jersey, September 1893 (Sejmour and Earle, Exsiccata Nos. 

 474a, 474b). The disease is also referred to as very troublesome in several of the 

 Experiment Station Bulletins, e.g. Humphrey, U.S.A. Exp. Stn. Mass. Eept. 

 1891, p. 231; Halstead, I.e.; Duggar, B. M., and Bailey, L. H., "Notes upon 

 Celery," U.S.A. Exp. Stn., Cornell, Bull. 132 (1897), pp. 201-230; Sturgis, 

 W. C, " On the prevention of leaf -blight and leaf-spot of Celery, Cerospora Apii, 

 and Septoria Petroselini var. Apii." U.S.A. Exp. Stn. Connecticut, 21st Ann. 

 Rept. (1898) pp. 167-71, etc. ; see also Duggar, B. M. 



X\ E.g. Briosi and Cavara, I.e. Saccardo, D., Exsiccata Mycotheca italica 

 No. 167, from Vittorio (Treviso), Sept. 1897 (sub nom. Septoria Petroselini I) . 



§§ Schoyen, W. M., Beretning om Skadeinsekter oq Plantesvgdomme, 1899 

 and 1900. 



(Ill Nypels, P., "Notes Pathologiq ues," Bull, Soc. Roy. Bot., Bela. xxxvi. 

 (1898), pp. 183-275. 



nH E.g. Delacroix et Maublanc, Maladies Parasiiaires des Plantes Cultivies. 



