164 FUNGOID PESTS OF CULTIVATED PLANTS. 



black, without forming definite spots, with long straight conidia, rounded 

 at the ends (14-18 x 1 6 ft). 



5 1 i another occurs on Orange as well as on Hoya leaves (Glccosporiiou 

 macropus) without forming any definite spots, the long conidia (18-21 

 x 4-6 /x) produced on very long basidia (-IH-GO fx long). Any of these 

 may be found in our conservatories at any time. 



The Olive is not sufficiently cultivated in this country to render its 

 parasites of much interest. 



Fig Mould. 



Botrijtis chierea (Pers.), fig. 10. 



This mould, long regarded as a saprophyte, has been found destructive 

 to ripe Figs, covering them with a dense felted mass of grey hyphas, and 

 bearing a profusion of oval conidia. It apfcars to be the same species as 

 causes the Lily disease. For other Fig parasites see " Pests of Orchard 

 and Fruit Garden," p. 137. 



Journ. R.H.S. xxviii. p. xxxix and p. 29. 



A black mould, Ccrcosjiora BoUcana (Thiim.), has occurred on Fig 

 leaves, and is believed to have appeared recently in Britain. 



Camellia Blotch. 

 Pestalozzia Chuepini (Desm.), PI. XIV. fig. 17, 



This disease is far from uncommon on the leaves of Camellia under 

 cultivation, and is so widely extended that it attacks the Tea plants in the 

 Tea gardens of I ndia. 



It causes unsightly large blotches on the living leaves, which are 

 mostly of a rounded form, but sometimes irregular through confluence of 

 the blotche They are bleached and of a silvery-white colour on the 

 upper rface, with a strongly defined outline, and sprinkled with the 

 black (hits which indicate the pustules. There are no true perithecia, 

 the sporules being produced in small cavities in the substance of the leaf, 

 the Burrounding (-ells modified and discoloured so as to form a false 



ptacle. 



The sporules are of a remarkable kind, peculiar to the genus. In out- 

 line the; omewhal Bpindle-shaped, being attenuated towards each end 

 (20// Long), with three or four tran verse divisions, the apical cell colourless 

 and conical, bearing a tuff of three or four long colourless hairs, which 



form a crest. The bottom cell is also colourless, and attenuated into a 



lone; livable h m equal in Length to that of the sporule. The intermediate 

 cells an coloured brown, and become at Length rather opaque. 'When 

 mature the morale an discharged fchrou'j;h the rupture of the cuticle. 



It is found throughout Europe and in North America, also on leaves 

 df RhodocL , Orange, Hoya, Magnolia, Smilax, Lagerstrosmia, and 



Umond, hut typically on < lamellia. 



The only check is to colled ami hum all diseased Leaves. 



s,,cc. Syll iii. il L6; Cooke, Hdbk. No. 1 101 with fig. L88. 



