BOOT CROPS. 61 



be allowed to dry before they are planted." We can 

 thoroTighly recommend tlie following " mixed " manure for 

 the growth of potatoes : — 



SI cwt. kainit 

 1 „ nitrate of soda . 

 ^ „ iron sulphate 

 2 „ mineral superphosphate 



The ingredients to be thoroughly mixed together, and 

 applied after setting the seed potatoes (See the author's 

 Treatise on Manures, or Manures and their Uses). (2) 



Fig. 26. — TuKNip " Fly " (Haltica nemorum). 



A. beetle (nat. Bize). 



B. Beetle (enlarged). 



C. Masses of eggs (nat. size). 



Burn all infested haulms, as this destroys any hibernating 

 sclerotia, etc, 



(7) The Parasites of Toenips {Brassica rapa). 



The Turnip Fly {Haltica nemorum, Phylletreta 

 nemorum, or " turnip flea," Fig. 26) belongs to the Halti- 

 cidce, a family of small beetles. They are oval insects, 

 often measuring less than one-twelfth of an inch in length. 



