Appendix B 371 



injury. Resort is had, therefore, to various substances to dilute 

 and carry the oil, such as soap-suds, milk, milk of lime, or even 

 water alone, when mixed with the water in forming the spray. 

 Kerosene preparations should be applied to plants with great 

 caution. They are very efficient in fighting certain injurious insects, 

 but if not properly applied, serious injury to 

 the plant may result. 



11. Kerosene Emulsion. Used for scale 

 and other sucking insects. Dissolve 2^-pound 

 of hard soap in one gallon of boiling water. 

 Then add two gallons of kerosene oil to the 

 water and thoroughly mix by pumping the 

 entire mixture through a bucket sprayer until 

 an emulsion is formed. (Fig. 231.) The bulk 

 of the mixture will increase about one half in 

 the process and assume the consistency of 

 cream. Now dilute to from twenty to thirty 

 gallons as desired. 

 Fig. 23irHand-bucket 12. Soluble or Miscible Oils. In recent 

 spray pump. A y ears preparations of emulsions of the common 

 shown is needed for oils have come into use. They are probably 

 sing ' not so good as lime-sulfur preparations but 

 may be applied with less annoyance when only a few plants are to be 

 sprayed. They are usually sold under proprietary names. All 

 that is necessary is to dilute with water and spray as directed. 



13. Dust Applications of Insecticides have not been so uni- 

 formly satisfactory as the liquid applications and are little used. 



14. Spraying Domestic Animals with poisons is sometimes 

 recommended to kill insects, ticks, and other parasites. Various 

 preparations of oils and arsenical preparations are used. London 

 Purple, dusted on the perches, nests, and bodies of poultry, is a very 

 satisfactory way to destroy mites on poultry. If applied regularly, 

 it becomes a preventive. 



