256 APPENDIX 



Insects in closed bins may be killed with the fumes of 

 this liquid. Use i pint for each 100 bu. of grain. 



Caution: Do not use this liquid in the presence of fire. 

 It is very inflammable and its fumes are explosive. 



Lime and Sulphur Mixture. See page 169. 



20 lb. lime. 

 14 lb. sulphur. 

 40 gal. water. 



Boil one hour and apply while still warm. This must be 

 applied before the buds come out in the spring. It will 

 destroy buds and foliage. 



Use for San Jose scale. 



Hydrocyanic Acid Gas. 



1 oz. cyanide of potash. 



2 oz. sulphuric acid. 

 4 oz. water. 



For each 100 cu. ft. of space. 



This gas is used for killing insects in rooms that may be 

 closed tight. Nursery stock is freed of all insect pests by 

 placing it in a room where this gas is generated. A room 

 should be thoroughly ventilated for at least ten minutes 

 before entering after the gas has been used. This is so 

 poisonous a gas that it is safer to have the fumigation done 

 by an expert or one who has had a great deal of experience 

 with it. 



Sticky Fly Paper. If a ring of any sticky substance 

 is placed about the trunk of a tree, it will prevent insects 

 climbing up to eat the foliage or to lay their eggs. Strips 

 of sticky fly paper may be used for this purpose. 



Use for the cankerworm. 



