— iqS — 



of the spores into the leaf must he preve7itcd U the crop is to be 

 protected. It is fair to suppose the copper solutions will be as 

 efficacious in this as in Strawberry Leaf-blight. 



The biological investigation of this presents peculiar difficulties, 

 for we have little doubt that it hibernates elsewhere than on the 

 fallen leaves of the previous season. 



III. LEAF-BI.IGHT OF QUINCE AND PEAR. 

 Entomosporium maculatuni. Lev. 



Five 5'ears ago Mr. 

 G. F. Wilcox of Fair- 

 port, N. Y., sent to 

 the Universit}^ Quince 

 leaves and fruits very 

 much diseased by the 

 above. The leaves were 

 affected by circular 

 brown spots from 1-3 

 millimetersin diameter, 

 and the fruits had many 



Fig. 5.— Leaf of Quince with spots of £«i;owo5/>o^/«w;«ac- brown patcllCS frOm 3-7 



^''poRiEt Deh '^°''' '"'^^' °''''^ latter much magnified. j,,iiii,,,eters in diameter 

 on the surface. At the centre of the di.sea.sed areas in both 

 ca.ses were small perithecia (or p.seudo-perithecia) containing 

 the insect-like spores (fig. 5, sp.) of this fungus, and arising from 

 the mycelium growing among the cells. These areas on the fruit 

 were slightly sunken as if a finger had been pressed on them. 

 Many of the fruits badly affected had cracked and all were un- 

 marketable. We reported it as Morthicra Mespilii, Fuckel ; var. 

 Cydoniae, Cooke and Ellis, the name by which it was usually 

 known at that time. Saccardo has revived the earlier name ]:.n- 

 tomosporium niaadahtm, Lev., which is given in his Sylloge Ftcn- 

 goriim, III, p. 657, and by which it is now usually mentioned. 



For some j-ears it has been scarce on the Quince although it was 

 abundant this^'ear in .some localities in New York. 



It affects the Pear in precise!}^ the same way, causing the leaves 

 to fall and the fruit to crack. The greatest injury, however, is 

 cau.sed by its attack on seedling pears or quinces in the nursery. 

 By causing the fall of the leaf the parasite so weakens the standard 

 that grafting will not succeed. 



