748 EXPERIMENT STATION RECORD. 



12, p. 58). with suggestions for its coutrol. The means recommeudetl for the 

 prevention of this disease include the cutting out of dead spots and dead wood 

 during the early spring and thorough spraying with Bordeaux mixture during 

 the growing season. 



The perfect stage of leaf spot of pear and quince, G. F. Atkinson {Science, 

 n. ser., 30 {,1909), Xo. 770, p. '/.j2). — Attention is called to the fact that the 

 perfect stage of the pear leaf spot fungus {Entomosporiutn maculatum) , although 

 prohably common, is easily oveiiooked and seldom reported. It is said to 

 occur quite abundantly on the leaves of the pear and quince affected with the 

 disease which have lain on the ground during the winter. 



Some years ago the author discovered the perfect stage of the fungus, which 

 was identified as Fahrcra sp.. but while he has several times grown the Entomo- 

 sporium from quince fruit in pure cultures, he has never obtained the perfect 

 stage of the fungus in these cultures. He has, however, carried the cultures in 

 the opposite direction and obtained the Entomosporium in pure cultures from 

 ascospores of the Fabraea. 



Pending the publication of a full account of his studies, the author thinks 

 it desirable to indicate the name of the fungus in its new position, and that the 

 name of the perfect form should be F. macula ta. 



A new disease of pears, E. Marchal (Bid. 8oc. Roy. Bot. Belg., J/o {1908), 

 No. 2, pp. 3-'i3, S'l-'i). — The presence of Phijtophthora oinniiora on pears in 

 Belgium is noted. The diseased fruit shows round brown spots, which in- 

 crease in size until the greater part of the fruit is affected, after which it falls. 

 In one instance the loss due to this fungus was great, fully one-half of the fruit 

 being destroyed. Where pears had been bagged they did not suffer from the 

 fungus. It is thought probable that the disease could be prevented by spray- 

 ing with Bordeaux mixture. 



The American gooseberry mildew and the proposed legislative measures, 

 E. S. Salmon {Pioc. Assoc. Ecoti. Biol., 1 {1909), No. .), pp. 150, 151).— An 

 abstract is given of a paper presented by the author, giving an account of the 

 introduction and spread of the gooseberry mildew {Sphwrothcca inors-uva) in 

 Europe, and reviewing the attempts made to secure legislation looking toward 

 the reduction of the disease in (ireat Britain. 



European currant rust on the white pine in America, P. Spaulding ( U. S. 

 Dcpt. Agr., Bur. Plant Indus. Circ. 38, pp. //). — Attention is called to the fact 

 that large importations of white pine seedlings have been made for planting 

 in the Northeastern and North-Central States during recent years and that 

 accomi)anying these seedlings diseased material has been found which upon 

 thorough examination proved to be affected with the white pine blight (Peridcr- 

 mium strobi). 



This fungus is perennial on the white pine and has for its alternate host 

 species of Ribes. It is known to incubate for at least a year on the white pine 

 before fruiting and the fruiting bodies are situated on the wood formed in the 

 second year. 



The fungus is of general distribution in Europe and on this account imported 

 white pine trees should be held under suspicion until proved free of the fungus. 

 The possible damage caused by the distribution of this fungus is Tery great 

 and precautions are suggested against its importation. 



The present status of the chestnut bark disease, H. Metcalf and J. F. Col- 

 lins {U. S. Dcpt. Agr., Bur. Plant Indus. Bui. IJ/l, pt. 5, pp. ^5-5'i. pi. 1, fig. 

 1). — A review is given of the history of the chestnut bark disease and its 

 present distribution is indicated. The disease, which is considered to be due 

 to the fungus Diaporthe parasitica, is apparently spreading with considerable 



