INSECT PESTS 55 



attacking L. auratum as well if in the full sun, 

 is best treated by Bordeaux mixture when the 

 trouble is above ground. Dissolve one pound 

 of sulphate of copper in a wooden tub and slake 

 one pound of fresh quicklime in another recep- 

 tacle. When slaked, pour the quicklime into the 

 sulphate of copper solution and add ten gallons 

 of water. Spray gently with this mixture and 

 repeat the operation in a week. Bulbs that are 

 seriously affected would better be destroyed. 

 The rust known as Uromyces Erythronii causes 

 discolored patches. As the bulbs are not at- 

 tacked, the best treaWent is to bum the dis- 

 eased stems and thus prevent a spread of the 

 fungus. The third fungus, Rhizopus necans, 

 gets into the bulbs through injured roots and 

 causes them to rot. 



