356 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



Cylindrnsporium fniit spot. This spot of apples which Avas 

 first described by Brooks* is caused by a fungus, Cylindro- 

 sporium pomi Brooks. It should not be confused with the dis- 

 ease of apples which has been known for several years as Bald- 

 win spot and which has been studied by a number of investiga- 

 tors. The Baldwin spot is not caused by the growth of a living 

 organism, as has been proved a number of times by men work- 

 ing in widely separated places. 



In Brooks' paper he has distinguished very clearly between the 

 two diseases, but the writers regard it as unfortunate that he has 

 substituted the name ''Fruit Pit" for a disease which has been 

 generally known in other parts of New England under the name 

 "Baldwin spot," because certain writers and others have erron- 

 eously used the term "Baldwin spot" so as to include an entirely 

 distinct disease. It is freely admitted, however, that if no con- 

 fusion would result and the disease were being described for the 

 first time, "Fruit Pit" is a more accurate descriptive term. In 

 a recent text-book on plant diseases, the Cylindrosporium disease 

 has been indexed as "Baldwin Fruit Spot" and this leads to more 

 or less confusion. The writers have heard the opinion expressed 

 a number of times that the cause of Baldwin spot was explained 

 by Brooks' study of this fungus. They wish simply to assist in 

 making clear the fact that Brooks recognised and described two 

 distinct diseases and that the disease caused by Cyliudrosporinm 

 pomi is not the same as the well known Baldwin spot, the char- 

 acters and occurrence of which were so well pointed out by 

 Jones.** Unfortunately in Jones' account of Baldwin spot he 

 includes the results of Lamson's apparent control of the disease 

 by spraying with bordeaux mixture. Brooks shows, however, 

 that there is every reason to believe that Lamson's results were 

 really from the control of the Cylindrosporium fruit spot which 

 he confused with the true Baldwin spot. 



The Cylindrosporium fruit spot occurs on a number of varie- 

 ties of apples, and the writers are convinced by their observations 

 that it does much more damage to some other varieties like the 

 Bellflower in Maine than it does to the Baldwin. 



* Brooks, Charles. The Fruit Spot of Apples. N. H. Exp. Sta. Report 

 20: 332-365- 1908. 

 ** Jones, L. R. Vt. Exp. Sta. Rep. 12, p. 161. 1899. 



