GEOGRArHIC DISTRIHUTION. If) 



Tuliisne/ Prillicnix.- and others (Coins conipleto d'aoricuUmv, T. 

 XV, p. 25."), art. IVm-Ikt) have studied this disease more or h'ss eare- 

 fuUy in Fratiee. where it often develops in a sei-ious form. In Jinu', 

 ISIX), the M riter saw the peaeh trees near the Medit(M-ran(>an. particu- 

 hirly about Montpellier. in anything but a h(>althy condition. On tiie 

 8d of June leaf curl was bad, and the ends of braneiies were seen to 

 be dying in some eases. In Italy Briosi and Cavara,"' Berlcse/ and 

 Conies'^ are among those who have deseribed tiiis mahidy. Tin* dis- 

 ease varies in its prevalence through Italy in aeeordanee with its 

 haltits elsewhere. The trees of northern Italy app«Mir(Hl more In^alth- 

 ful than in the south of France during the \isit of the writer in 18"J0, 

 but considerable gmnmosis, perhaps due to the same cause, was 

 observed in both r(>gions. In western Sicily, near Palermo, leaf curl 

 was again encountered in severe form. The situation in Sv)ain and 

 Portugal is not known, l)ut in the more iuuuid coast regions it should 

 not l)e materially ditl'erent from the condition found in Italy. In 

 Greece, as stated ])v Prof. P. Genardius/' the disease rarely causes 

 any damage of importance, ])ecausc of the dr3Miess of the climate, and 

 for this reason, he states, no trcatuKMit has ])een tried. In Austria- 

 Hungary the situation respecting leaf curl is much the same as in 

 Italy. Dr. Johaim Polle, director of the Institute of ^Experimental 

 Agricultural Chemistry, at Gorizia, writing from the island of Cherso, 

 under date of October 25, 1897, states that in rainy weather 

 the disease appears some years with great intensity and causes great 

 damaoe. In Roumania the situation is much the same. Prof. Wilhelm 

 Knechtel, of the Agricultural School of Hcrcstrau, states in a letter 

 dated Buchiu-est, October 17, 1897, that in that country leaf curl of the 

 peach is also a troublesome and destructive disease to which the trees 

 are su])ject in many years. He states that Roumania has in the region 

 of the lower Danube almost a steppe climate — in smimier very hot 

 and dry, in winter cold, with very abrupt temperature changes, so 

 that the variations of temperature within twenty-four hours not infre- 

 quently amount to from 10° to 15° R. (22.50° to 33.75° F.). When 

 such changes of temperature occur in the spring at the time of leaf 

 development the disease is certain to appear. The growth of the 

 vegetation, which has been favored through the preceding warm days, 

 is checked during succeeding days of lowered temperature, when 



^Tulasne, L. R., Ann. d. Sci. Nat., 1866, ser. 5, T. V, p. 128. ' 



^Prillieux, Ed., Bull, de la Soc. Bot. de France, 1872, T. XIX, pp. 227-230; Compt. 

 Rend. 3; also Maladies des Plantes Agricoles, Paris, 1895, T. I, pp. 394-400. 



^ Briosi, G., and Cavara, F., Fungi Parassiti d. Piante Coltiv. od Utili, essice., delin. 

 e descr., 1891, fasc. 5, No. 104. 



■'Berlese, A. N., I Parassiti Vegetali d. Piante Coltiv. o Utili, Milano, 1895, pp. 

 124-126. 



^ Comes, O., Crittogamia Agraria, Napoli, 1891, pp. 163, 165-167, 549. 



* Letter dated Athens, Sept. 12, 1895. 



