304 THE MONTHLY BULLETIN. 



{Saissetia olece), European fruit scale (Lecaiiiuin conii). European 

 pear scale {Epidiaspis piricola), cherry scale [Eul( <(iiiiuin arnsontm) 

 and other scales infestini>' deciduous fruit trees. It should be applied 

 in the winter, when the trees are dormant. 



To also kill moss or lichens on fruit trees add two pounds of lye to 

 the formula of the stock solution. 



DISTILLATE OIL MECHANICAL MIXTURE. 



Water LlOO ■iulloiis 



Caustic soda (95 per cent) 7 pounrls 



Distillate (28 degrees Banme ) 10 gallons 



Fill spray tank with the required amotint of water; add the caustic 

 soda, which has been dissolved in a small amount of water and then the 

 distillate. Keep agitator going rapidly while applying the spray. 



This spray has been thoroughly tested by the writer and is one of the 

 cheapest and best for spraying black scale (Saissetia olece) or the Euro- 

 pean fruit scale {Lecanium corni) on apricot and olive trees. 



DISTILLATE EMULSION AND TOBACCO. 

 (Government Formula for Pear Thrips.) 



Water T2 gallons 



Whale oil soap '.>(} pounds 



Distillate (32 to 34 degrees Baume ) 20 pounds 



The above emulsion is prepared in the ordinary way as a stock solu- 

 tion. For use in the orchard dilute one to twenty parts of water. To 

 every two hundred gallons of this diluted spray add one pint of tobacco 

 extract containing forty per cent nicotine or about three and one half 

 gallons of tobacco extract containing 2f per cent nicotine. 



This spray is especially recorhmended for pear thrips. 



RESIN WASH. 



Though not a true emulsion and fast losing prominence as a spray, 

 this wash is included here because of its value as a spray and dip for 

 plants with tender foliage. 



Kcsin 10 pounds 



Caustic soda (76 per cent) ."> pounds 



Fish oil — di^^^i^ : li pounds' 



Water _. . 50 gallons- 



Put oil, rt^sin and a gallon of water in an iron kettle and heat until 

 the resin is softened; add the lye (dissolved in a small amount of water) 

 and stir thoroughly, after which add enough water to make fifty gallons 

 of spraying material. 



This wash is only effective for young scale insects, plant lice, or otho- 

 soft-bodied insects. 



