882 EXPERIMENT STATION RECORD. 



The scab or verrucosis of lemons, G. Briosi and R. Farneti (Atti. 1st. Bot. Univ. 

 Pavia, .'. ser., 10 (1904), P- 60; abs. in Bot. Centbl., 95 ( 1904), No. 19, p. 515).— A 

 description is given of a disease of lemons and citrons in Sicily, which is supposed to 

 be the same as the disease known in this country as scab or verrucosis. A study of 

 the fungus has led the authors to describe it as belonging to a new genus, Rhynchodi- 

 plodia titri. 



Mummy oranges and citrons (But. Mens. Off Renseignemenis Agr., 3 (1904), No. 

 6, pp. 691-693). — A summary is given of an article published in Agricoltura Modema, 

 in which is described a disease of oranges and citrons which results in the drying 

 and hardening of the fruits. The fruits are found to be attacked by fungi, the prin- 

 cipal of which is said to be Botrytis cilricola, n. sp. This fungus is said to be para- 

 sitic and is thought will prove of considerable importance to the orange and citron 

 groves of Italy. It is closely related to B. cinerea, but differs in some material 

 respects which are described. 



For the prevention of the spread of the disease, particularly to fruits that have 

 been gathered, the author recommends the rejection of all which show any rusted 

 spots upon the skin and storage of the fruit in well aerated and dry places only. 



The pineapple disease, H. Tryon (Queensland Agr. Jour., 15 (1904), No. 1, ]>]>. 

 477-484)- — A discussion is given of a disease of pineapples, the presence of which 

 may be recognized by the modified appearance of the plants. Their ordinary dark- 

 green color gives place to red and yellow, the plants become wilted, the leaves 

 twisted, and later a brownish coloration is quite noticeable. After the disease 

 becomes well established its presence can be observed in the unevennessof the rows, 

 the stunted, discolored plants being quite conspicuous. 



The author describes various agencies that have been suggested as the cause of 

 this disease, and from his investigations is led to believe that it is due to the presence 

 of some undetermined fungus which attacks the roots, causing their decay. The 

 presence of the fungus, however, is believed to depend upon a weakened condition 

 of the plants, which is primarily caused by the soil not being in condition for healthy 

 growth . 



Investigations on the coffee disease due to Stilbella flavida, F. G. Kohl 

 (Beihefte Tropenpflanzer, 1903, No. 2, pp. 61-77; abs. in Bot. Centbl., 95 (1904), No. 13, 

 pp. 335, 336). — Based upon abundant material from coffee plantations in Central 

 America, the author has made a study of the coffee-disease fungus, formerly known 

 as Stilbum flavidum. By studying it in pure cultures he has determined the fungus 

 to be a hymenomycete and not in any way connected with S. vulgare, a basidiomy- 

 cetous fungus, which is the type of the genus. On this account he proposes a new 

 name, Stilbella flavida, and points out a number of fungi which have been described 

 by various authors and which he claims should be referred to it. 



For combating the disease he recommends the collection and destruction of all 

 diseased and fallen leaves, twigs, fruits, etc. ; the destruction of all young diseased 

 plants; the stimulation of plants to active growth by the use of proper fertilizers, 

 irrigation, drainage, etc.; the reduction of shade; the pruning of the trees, and 

 finally by the active use of fungicides. 



A new cacao disease (Agr. News [Barbados'], 3 (1904), No. 62, p. 281). — The occur- 

 rence of a disease affecting the twigs and leaves of cacao in St. Lucia is reported. 

 The external appearance of the twigs is said to be quite characteristic, the hyphje of 

 the fungus being joined together into dark-colored threads resembling in a way loose 

 bunches of horse-hair. A similar disease has been reported as occurring on tea in 

 India and Ceylon, which it was found possible to prevent in those countries by careful 

 pruning and the use of a lime-sulphur wash. So far as the author's information goes, 

 this disease has not been previously reported as occurring on cacao in the West Indies. 



The leaf cast of Pinus cembra, H. C. Schellenberg (Schweiz. Ztschr. Forstw., 



