VEGETABLE AND FIELD CHOPS 



197 



acre about three weeks after cut- 

 ting is finished and before the rust 

 appears is ]:)eneficial.^ It is best to 

 sulphur early, and only when dew 

 is present. 



In regions subject to rain, where 

 the sulphur treatment is not appli- 

 cable, three sprayings with sulphur- 

 soda soap are recommended : first 

 in July, with other applications at 

 intervals of three weeks. In New 

 York three sprayings with Bordeaux 

 mixture with resin added as an ad- 

 hesive gave a gain of $132.75 per 

 acre.- 



Colletotrichose {C oUetotrichwm 

 sp.). — This disease is known by 

 its very numerous black acervuli 

 borne in a blanched liackground 

 upon the stem. It develops late in 

 the season. 



Leopard spot. — The asparagus 

 leopard spot is strikingly suggestive 

 of its name. It consists of long ir- 

 regular spots, ashen in color, with 

 dark l^orders. No treatment is 

 known. 



i'\ 



• Smith, R. E., Cal. Agr. Exp. Sta. Bui. 

 165, January, 1905. 



2 Shrine, F. A., N.Y. (Geneva) Agr. Exp. 

 Sta. Bui. 188, p. 251, & Bull. 189. 



Fig. 87. — Anthracnose 

 spots upon bean pods. 

 After Stewart. 



