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150 Report oF THE BOTANIST OF THB 
stages and does not injure the vegetative portion or that which 
answers as the root system of the rust. As yet it has not been 
shown that the Darluca ever attacks the thick-walled winter 
spores. Hence the indications eve that Darluca will not exter- 
minate the rust nor even act as a material check, especially where 
asparagus is grown in large quantities, 
Dr. Pammel*s states that Darluca has more delicate spores than 
the rust and is more susceptible to the spray of the fungicide. 
During the past three years no appreciable difference in the 
amount of Darluca, on sprayed plants which had become rusted 
and on unsprayed rusty plants, has been observed. 
. CONCLUSIONS. 
All three stages of the asparagus rust occur in New York State. 
The first stage is usually found on seedling and neglected beds 
onty. The uredo and teleutospore stages can both be found on 
the same plant at the same time whether it be June or October. 
Furthermore both stages may occur together in the same rift or 
sorus. 
Cutting and burning too early in the fall is injurious. Late 
burning admits of scattering of the spores, and combined with 
this is the ever present fact of neglected fields and volunteer 
asparagus as a source of infection; hence it is a question whether 
burning is a profitable or even a practical method to follow in 
combating asparagus rust, 
Thus far no variety of asparagus has entirely withstood the 
attacks of the rust in this State. In instances where one variety 
has shown slight advantages it was questionable whether the 
difference was not due to age or. surrounding conditions instead 
of to any inherent qualities. . | 
Although Messrs. Stone and Smith assert that there is a 
variation in the distribution and attacks of the rust due to differ- 
ent soil conditions and that the uredo stage is limited to sandy 
soils in Massachusetts, no such variations have been observed i. 
this State. Furthermore it appears from conditions found here 
*Towa Agr. Exp. Sta., Bul. 53, p. 64, 1900. 
