1094 EXPERIMENT STATION RECORD. 



causing the disease has been studied, and inoculation experiments have proved it to 

 be the cause of the apple decay. The disease has not been at all serious, and should 

 it threaten to become destructive, Bordeaux mixture properly applied, it is believed 

 would be an efficient remedy. 



Trichotheciuni roseura as a cause of bitter rot, K. S. Ivanov (Ztschr. Pfian- 

 zenkrank., 14 {1904), No. 1, pp. 30-40, fig. 1). — The bitter rot of apples and other 

 fruits due t<> the fungi Cephalothecium foseum and THchothedum roseum is described 

 and attention called to the fact of two morphologically nearly related fungi causing 

 similar diseases. The Cephalothecium occurs on the fruit of the apple and probably 

 on the pear, while the Trichotheciurn is reported as attacking the apple, pear, plum, 

 filbert, and nuts of Pinus cembra. The infrequent occurrence of Trichotheciurn is 

 attributed to the exceedingly long period of development of the fungus. 



Peach rosette, P. Evans (Missouri Fruit Sta. Bui. 11, pp. 11, figs. 3). — Peach 

 rosette is described, with notes on its distribution and economic importance in Mis- 

 souri and other western States. The disease was first noticed on the station grounds 

 in 1901 and since that time has spread extensively, causing serious losses. Usually 

 the disease is rapidly fatal, but some instances are known where trees survive 2 years. 



A very similar disease was observed on plum trees, and although cross inocula- 

 tions have been made, it, is not yet certain whether the 2 diseases are identical. 



The only treatment recommended by the author for rosette is the removal and 

 destruction of all affected trees. 



Diseases of orange trees, K. A. Davis (Transvaal Agr. Jour., 3 (1905), No. 10, 

 />/>. 340-342). — Brief notes are given on a number of orange diseases. Among them 

 are described the collar rot, also known as gummosis and root rot, the mottled leaf, 

 which is said to be a form of partial chlorosis, an apparently new leaf-spot disease, 

 and die back. 



The mottled leaf and leaf-spot diseases are both apparently of recent occurrence, 

 and the former may be recognized by the tendency on the part of the leaves to turn 

 yellow without any evidence of fungus growth. The application of a general ferti- 

 lizer by improving the health of the tree has generally proved beneficial. The leaf- 

 spot disease is apparently of fungus origin and is easily distinguished by the occur- 

 rence of brownish spots on the under side of the leaves. 



As yet no fungus has been separated as the definite cause of the disease, and the 

 author reports that a single spraying with Bordeaux mixture will usually prevent 

 further spread of the disease. 



• Spraying fruit trees and bushes, W. E. Bear (Jour. ,Bd. Agr. [London], 11 

 (190.5), No. 11, pp. 641-650) . — Directions are given for the preparation of a number of 

 the more common fungicides and insecticides, and notes on their application in pre- 

 venting fungus and insect injuries of apples, plums, pears, cherries, gooseberries, and 

 currants. 



Bacterial gummosis of grapes, G. Chappaz (Prog. Agr. et Vit. (Ed. V Est), 26 

 (1905), No. 9, pp. 269-272). — Notes are given on the occurrence of the bacterial gum- 

 mosis of grapes in Lower Burgundy and elsewhere. 



The characteristics of the disease are described, and for its prevention the author 

 recommends heavy applications of superphosphate fertilizers. At the same time the 

 diseased portions of the vine should be cut out and destroyed, and the vines washed 

 with a solution containing 25 to 30 per cent of iron sulphate. 



Resistance of the Lienoir grape to the California vine disease, N. B. Pierce 

 (Pacific Rural Press, 69 (1905), No. 5, p. 78).- — The author reports the results of his 

 investigations on the use of the Lenoir variety of grapes for the control of the Cali- 

 fornia vine disease. 



The experiments with grafted stock have been in progress in a badly affected dis- 

 trict for more than 8 years, during which time more than 400 acres of vines have 

 been grafted. From this work the following conclusions are drawn: The Lenoir 



