72 



HATCH EXPERIMENT STATION. 



[Jan. 



Bordeaux mixture for this and one or two other somewhat 

 similar cucumber diseases, and have received reports from 

 Arlington of favorable results from such treatment. While 

 this is a most destructive disease if left unchecked, it ought 

 nevertheless to be kept under control with comparative ease 

 if judicious spra3'ing with any good fungicide be combined 

 with proper management of the crop. 



An Unusual Outbreak of Two Husts. 

 The Asjjaragus Bust {Puceinia asparagi, D. C). 

 The rust of the asparagus has been known in Europe for 

 more than half a century, and has caused more or less dam- 

 age there. In this country it has been known for several 



years, but not at 

 all extensively. 

 During the pres- 

 ent season, how- 

 ever, asparagus 

 beds in various 

 parts of this 

 State, in New 

 Jersey ai^tl doubt- 

 1 e s s in other 

 States, have been 

 seriously attacked 

 by this rust, and 

 are threatened 



Fig. 5. — Section of a cluster of teleuto spores of P. asparagi, With grCat injury 

 greatly enlarged. should it COlltinUO 



to develop extensively from year to year. This fungus 

 is one of the true rusts, and is quite similar to that at- 

 tacking the wheat. Like it, there are three distinct stages 

 of development, in each of which a different kind of spore 

 is produced. According to European accounts, the rust 

 first appears on the asparagus in the spring, at which time 

 it produces the first kind of spores, the cecidia. These de- 

 velop in turn during the summer, and produce the spores 

 of the second or red-rust stage, the uredo spores. These 

 again develop, and produce spores of the third or ])lack-rust 

 stage, the teleuto spores, which lie over winter and in the 



