974 EXPERIMENT STATION RECORD. 



Wither-tip and other diseases of citrus trees and fruits caused by Col- 

 letotrichum glceosporioides, I'. 11. Kolfs {U. S. Dept. Ac/r., Bureau of I'huit 

 Jndustru Jiul. 5'2, pp. 2J, pis. 6). — During experiments carried out by the author it 

 waa found that this fungus was the cause of wither-tip on orange, pomelo, and lemon 

 twigs; leaf spot on the leaves of various citrus trees; and anthracnose on lime l>los- 

 soms and fruit twigs and on lemon twigs, as well as lemon spot on ripe lenions and 

 canker on limes. These various troubles nmst, therefore, be considered as different 

 forms of the same disease. 



The disease occurs in Florida, West Indies, South America, Australia, and Malta, 

 and causes extensive injuries in some localities. Infection apparently takes place at 

 the tip of twigs or at the edge of the leaf. Fruit infection may be due to bruising 

 the skin. The lime is the most seriously attacked of the various citrus trees. Notes 

 are given on the dangers of infection in lemons while in the coloring house or color- 

 ing bed. 



The measures to be adopted in preventing the disease depend upon its form. For 

 lemon spot, sulphur spray is reconmiended as well as ainmoniacal solution of copper 

 carJjonate. Lime trees may be sprayed with Bordeaux mixture. In isolated trees 

 affected twigs may be cut out and destroyed. Beneficial results may also be obtained 

 from thorough cultivation and from the use of fertilizers which contain plenty of 

 potash. 



A Glceosporium rot of cherries, A. Osterwalder {Centhl. Ball. u. Par., 2. 

 Abt., 11 [1903), No. 6-7, pp. 225, 226, pi. 1). — A brief account is given of a disease of 

 both red and black cherries, which is said to be due toa species of Gkieosporium. The 

 fungus produces a very characteristic appearance upon the fruit and develops a con- 

 spicuous stroma beneath the epidermis. The mycelium is colorless. A technical 

 descrii:)tion of the organism is given, and it is compared with G. frwUijinnun and 

 G. versicolor which are probably identical, as shown by the investigations of several 

 authors. Infection experiments showed that spores introduced into cherries pro- 

 duced the characteristic spots within 5 to 10 days. 



liBctures on the diseases of the sugar cane, L. Lewton-Brain {Imp. Dept. 

 Ayr. West Indies, Pamphlet 29, 1904, i)p. 51, jig. 1). — A series of lectures delivered 

 before the Barbados Agricultural Society, in which the structure and functions of 

 the various parts of the sugar-cane plant are described, and the effects produced by 

 fungi and other agents in destroying the normal activities of the plant are shown. 



Following the preliminary statements, three of the more destructive cane diseases 

 are described and suggestions given for combating them. Those described are the 

 rind disease, due to Trichosphxria sacchari, the pineapple disease caused by Tliielavi- 

 ojisis rthaceiicus, and the root disease caused by Marasmius sacchari. Care in selecting 

 seed cane, cultivation, and rotation where the disease has gained a foothold are rec- 

 ommended, as well as treatment of the cuttings with Bordeaux mixture before 

 planting. The use of this fungicide for preventing attacks of the pineapple disease 

 has given good results. Where the fungi have become well established all diseased 

 canes, trash, etc., should be rigorously destroyed by burning. 



ENTOMOLOGY. 



Third report of the State entomologist, W. E. Britton {Connecticut State Sia- 

 Rpt. 1903, pt. 3, pp. 199-286, pis. 8, figs. 16). — A copy is presented of the insect pest 

 law of the State of Connecticut and notes are given on the organization of the office 

 of the State entomologist, publications of this office, and inspection of nurseries, li 

 is hinted that a compulsory fumigation law is contemplated. The nurseries in Con- 

 necticut are said to be in about the same condition as during the season of 1902. 



A general review is presented of insect conditions during the year under report, 

 with special reference to plant life, scale insects, tent caterpillars, elm-leaf beetles, etc. 



