1902.] PUBLIC DOCUMENT — No. 33. 59 



of these trees could have boi'n .saved if the}- had been out 

 back in time, in order to correlate top growth with that of 

 the roots, yiany of our maple trees, Avhen grown on dry, 

 gi*avelly soil, suffer greatly during a season of drought, and 

 the effect of this suffering is usually increased by the pres- 

 ence of borers in the following years. In cities the re- 

 stricted growi;h of roots, caused b}' pavements, sidewalks, 

 regrading, etc., induces similar pathological conditions in 

 the tree, which are sooner or later followed by the same mis- 

 chief-makers. 



The Present Status of CHRYSANTHEajuM Rust in Mas- 

 sachusetts. 



The chrysanthemum rust was first noticed in this State in 

 the fall of 1896,* this being the first recorded instance of 

 the appearance of the rust in the United States. The fol- 

 lowing year it became more widely disseminated in Massa- 

 chusetts, and has since extended over the larger portion of 

 the United States. f We have never, however, regarded its 

 appearance in this State as a matter of very serious conse- 

 quence ; nevertheless, we have felt it necessary to keep a 

 watchful eye over its presence in our midst. During the 

 past fall we have made an effort to obtain, by means of 

 circulars, whatever information could be secured ; and in so 

 far as its occurrence in this State is concerned, this informa- 

 tion has borne out our conception of it. 



Only one stage of the rust, the uredo, has been found 

 on the plants affected in Massachusetts. In the absence of 

 the other stages which are characteristic of rusts, it might 

 be expected that it would not obtain a very strong foothold. 

 Upon this point Dr. Arthur | writes as follows: "Another 

 circumstance much in the cultivator's favor is the propagation 

 of the disease without the formation of the customary teleuto 

 spores or third stage. Not only does this render the disease 

 far less persistent, but without doubt indicates that it is less 

 vigorous in its attacks. In general, when a rust is confined 



* Annual report of the Hatch Experiment Station for 1896, pp. 276-279. 

 t For details connected wi^h the spread of the rust, etc., consult Bulletin No. Sf), 

 October, IHOO, Indiana Agricultural Experiment Station. 

 X Bulletin No. 8.'), p. 128, Indiana Atrricultural Experiment Station. 



