Family Liliaceae 283 



obtained good results by spraying with 5-5-40 Bor- 

 deaux to which was added 2 gallons of a resin 

 mixture (made up of 5 Ibs. resin, I Ib. potash, or lye, 

 I pint fish oil, and 5 gals, water) to each 10 gallons of 

 Bordeaux. Another good treatment is dusting the 

 asparagus tops with flowers of sulphur. To be 

 effective, this must be applied in the form of a fine 

 smoke-like dust. If the tops are too dry they may be 

 wetted with whale oil soap water, or the grower must 

 wait for a heavy dew or rain. There are many ' ' dust 

 sprayers" on the market, many of which have their 

 good qualities. There are two main types of dust 

 sprayers, the "seed sower " and the "fan blower.'* 

 The former throws a tremendous dust cloud. The 

 fan blower sends out small clouds and covers less 

 area. The number of applications will depend on the 

 amount of dew in the season. In general, three 

 applications using one half a sack of flowers of sul- 

 phur per acre during the season will suffice. The 

 practice of applying ordinary salt (NaCl) to the soil 

 will not injure the asparagus crop but it will fail to 

 control rust. 



Resistant Varieties. It is a well-known fact that 

 some varieties of asparagus are more resistant to rust 

 than others. The Canovers Colossal which is the 

 canning type is a variety which is badly subject to 

 rust. The same is also true for the Columbian 

 White and the Moore's Cross-Bred variety. On 

 the other hand the Palmetto Type and the French 

 or Argenteuil Barrs mammoth are fairly resistant. 



Natural Enemies. Puccinia asparagi, although 



