CITRUS DISEASES. 117 



Capnodium citri Berk. & Desm. Very common in all sections, forming black, 

 superficial, sooty layers over fruit, leaves and twigs of all types of citrus 

 fruits. Follows turtle-hack, hemispheric scale, wooly white fly, and other in- 

 sects. Not parasitic. 



Vephaleuros virescens Kunze. Forming spots on living leaves, twigs and liavk of 

 lime/ lemon, sweet lemon, sweet and sour orange, and grapefruit. Very 

 common in all sections. 



Cladosporium citri (?) Massee. On living leaves, twigs, and fruit of grapefruit, 

 lemon (all types), sour orange, sweet orange (rare), king orange. Common. 



Cladosporium herbarum, Link. On dead leaves, or in old anthracnose spots, Rio 

 Piedras, Pueblo Viejo. Saprophyte. 



ColletotricJmm gloeosporioides Pen/. On living leaves, twigs, and fruit, and dead 

 citrus material of nil kinds. The cause of leaf spotting, withertip, fruit, 

 S])otting, fruit rot, and russeting. Exceedingly eounnon everywhere, :ui<i on 

 all host species. 



Corticinm. conflueiis Fr. On dead wood of grapefruit, Ciunpo Alegre. 



Cortieivm salmovicolor B. & Br. Causing the deatli of branches of grapefruit 

 and orange, Pueblo Viejo, Garrochales, Espinosa, Bayamon, Rio Piedras. 



Dnldinia conc^ntrica (Bolt.) E. & E. On dead citrus wood, T'ueblo Viejo, Palo 

 Seco, Garrochales, Espinosa. 



Diplodia natalensis Evans. Causing fruit rot, twig blight, bark canker of or- 

 ange and grapefruit, and collected in fruiting condition on mummified fruits 

 twigs, bark, and roots, in all sei-tions of tlie Island. 



Hypoxylon fitscopurpurea Berk. On dead grapefruit branches, Campo Alegre. 



Lecanidion cyaneum (Cooke) Sacc. On dead twigs, grapefruit, Campo Alegre. 

 Leptothyrium pomi (?) (M. & P.) Sacc. On fruit of orange and grapefruit, 

 common. 



Myrothecium verrucaria (A. & S.) Ditm. On dead grapefruit leaf, Rio Piedras. 



Nectria episphaeria (Tode) Fries. On dying bark, grapefruit, following Corti- 

 cium salmonicolor, or other injury, Bayamon. 



PenicilUum crustaceum L. On dead grapefruit wood, Sabana Liana. 



PenieilUum digitaUim (Fr.) Sacc. Olive-green mold, attacking all species of cit- 

 rus fruits. Exceedingly common everywhere. 



Pe7iicillum italicum Wehmer. Blue-green mold on all types of fruit. Not com- 

 mon. 



Peniophora cinerea Fr. On dead wood and twigs, orange and grapefruit, Pueblo 

 Viejo, Campo Alegie, Espinosa, Bayamon. 



PeinopJiora flavido-alha Cooke. On dead wood, grapefruit, Vega Baja. 



Pestaloszia guepinia Desm. On grapefruit leaves, Espinosa. 



Phomopsis citri Faweett. On living leaves, twigs, and fruit; and dead twigs of 

 orange and grapefruit, Rio Piedras, Palo Seco, Bayamon. 



' The following scientific names for the citrus species are recognized : 

 Citrus decumana, grapefruit, pomelo. 

 Citrus sinensis, sweet orange. 



Citrus Hmonia, lemon, sweet lemon, rough lemon. 

 Citrus aurantiuvi, sour orange. 

 Citrus aurantifolia, lime. 

 Citrus nobiHs, king orange, mandarine, satsuma, tangerine. 



