FUNGOID PESTS OF CULTIVATED PLANTS. 147 



Roundish or elliptical paler spots are formed on the canes, over which 

 the dot-like receptacles are scattered immersed in the substance of the 

 spot, which is pierced by the dot-like orifice. Around this opening the 

 substance is a little raised and blackened, so as to form a kind of ring. 

 The conidia are sausage-shaped, narrow and slightly curved, obtuse at 

 the ends (14-18 x 4-5 /*). 



Has been very little observed, although apparently a true parasite. 

 Hence it is not likely to give trouble, or it would scarcely have rested so long. 



Apparently only known in Britain and Holland. 



Sacc. Syll. iii. 2206 and 4912 ; Berk. Ann. N. H. No. 193, fig. ; 

 Cooke Hdbk. No. 1356. 



Raspberry cane blight, attributed to Coniothyrium Fuckelii, is more 

 or less common in the Raspberry plantations of New York State, causing 

 the plants to die about the time that the fruit is ripening. The fungus is 

 known in Europe. 



RASPBERRY ANTHRACNOSE. 

 GloBosporium venetum (Speg.), PI. XII. fig. 36. 



We are not thoroughly convinced that this Anthracnose has occurred 

 in Britain, although it is well known in Continental Europe, in the 

 United States, and in Australia. 



On the leaves it produces large marginal spots of a honey colour, 

 margined by a distinct purplish line ; towards the centre of the leaf the 

 spots are smaller and rounded. On the petioles and young twigs the 

 spots are more definitely elliptical and pallid, and on the young canes. 



The pustules are without any true receptacle, sunk in the substance of 

 the leaf or stem, and the conidia are produced within these cells, elliptical 

 and colourless (7-8 x 2-2 \ //.), often with two small nuclei, and ejected when 

 mature through a fissure in the cuticle as a gelatinous boss or tendril. 



The conidia germinate readily and spread the disease. Young canes are 

 not killed the first season, but succumb on the second, the fruit remaining 

 small and shrivelled. Spraying with sulphate of iron solution and diluted 

 Bordeaux mixture has been recommended. Nothing will save the canes 

 when thoroughly attacked, and the only alternative is to burn and prevent 

 the spread of disease. 



Sacc. Syll. iii. 3962 ; Mass. PL Dis. 286 ; Tubeuf, Dis. 483. 



Raspberry canes are reported in Australia as suffering from attack at 

 the roots of the mycelium of the very common clustered Agaric (Hypho- 

 loma fasciculare), so plentiful about old stumps in this country. 



" Raspberry Cane Blight," see Journ. R.H.S. xxviii. p. 288. 



RASPBERRY BRAND. 



Phragmidium Rubi-Idai. 



This very interesting brand, or rust, of the Raspberry, more often 

 makes its appearance on the wild than upon the cultivated plants. In 

 fact, it never has been an orchard pest, and yet it has been long enough 

 known to have been called by at least thirteen names. 



L2 



