VEGETABLE AND FIELD CBOPS 



197 



acre about three weeks after cut- 

 ting is finished and before the rust 

 appears is beneficial.^ 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 apphcations 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 olletotrichum 

 sp.). — This disease is known by 

 its very numerous black acervuli 

 borne in a blanched background 

 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 borders. No treatment is 

 known. 



.# 



t. ^> 



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

 165, January, 1905. 



^ Sirrine, F. A., N.Y. (Geneva) Agr. Exp. 

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



Fig. 87. — Anthracnose 

 spots upon beau pods. 

 After Stewart. 



