DISEASES OF CROPS 



953 



dwarfing of the new shoots and leaves and when severe a shriveling up and 

 dying. 



Treatment. — 

 Dig and burn all 

 diseased vines, and 

 spray with Bor- 

 deaux mixture. 



Crown Gall. — 

 See Apple. 



Note . — A 

 number of other 

 minor diseases will 

 be controlled by 

 the treatment pre- 

 scribed for the rot. 



ASPARAGUS 

 Rust (Puccinia 

 asparagi, D. C). — 

 This fungus causes 

 the tops of the 

 plants to redden 

 soon after blossom- 

 ing. The leaves 

 turn yellow and 

 fall, and the stems 

 show numerous 

 small blisters con- 

 taining masses of 

 rust-colored powder 

 (spores). Later in 

 the season these 

 pustules break and 

 become black in 

 color. The disease 

 spreads rapidly and 

 causes heavy losses. 

 Treatment. — 

 Cut and burn dis- 

 eased plants as soon 

 as observed. Spray 

 with Bordeaux mix- 

 ture. 



.' 



Anthkacxose of Bean. 1 



The brown spots occur on both the pods and plants. They 

 are caused by spores coming in contact with the tender plant 

 tissues, where they germinate and give rise to serious damage. 



Cornell Agricultural Experiment Station Bulletin 255. 



