SPRAYING FOR ASPARAGUS RUST* 



F. A. SiRRINH. 



SUMMARY. 



All three stages of asparagus rust appear in this State. More 

 than one stage can occur in the sarrie rift or sorus. 



Cutting and burning early in the fall to destroy the rust is in- 

 jurious to the asparagus plants and is not recommended. 



Thus far, in this State, no variety of asparagus has entirely 

 withstood the attacks of the rust. 



In 1898-1899 a gain of 69.5 per ct. in yield, equivalent to a 

 financial gain of 94 per ct., was obtained by spraying; and in 

 1899-1900, under unfavorable conditions, a gain of 47.8 per ct. 

 in yield or 44.5 per ct. in value. In no case did injury to 

 the asparagus result from the use of resin-Bordeaux mixture. 



A specially-constructed power sprayer was used to advantage 

 in our work. This sprayer met all the requirements of an ideal 

 machine, did the work more thoroughly and rapidly than couid 

 be done by hand, and also saved materials. It is not patented. 

 Probably such a machine cannot be built for much less than 

 |200. It is recommended that those who grow less than live 

 acres undertake the byilding of such machines only in coopera- 

 tion with others. 



I. TESTS WITH RESIN-BORDEAUX MIXTURE. 



INTRODUCTION. 



Asparagus rust, Puccinia asparagi DC, has been more or less 

 prevalent in this State during the past five years. Each year it 



♦Reprint of Bulletin No. 188. 



