178 Bulletin 245. 



This preparation loses its strength upon standing, and should therefore be 

 made immediately before using. Particularly valuable for surface mildews. 



Hellebore. 



Fresh white hellebore i ounce 



Water 3 gallons 



Apply when thoroughly mixed. This poison is not so energetic as the arsenites, 

 and may be used to within a short time before the edible portions of the plant 

 mature. It is important to have fresh powder. For insects which chew. 



Kerosene Emulsion. 



Hard, soft or whale oil soap ^ pound 



Boiling soft water i gallon 



Kerosene 2 gallons 



Dissolve the soap in the water, add the kerosene, and churn with a pump for 5 

 to ID minutes. Dilute 4 to 10 times before applying. Use strong emulsion for 

 all scale insects. For such insects as plant-lice, mealy-bugs, red spider, thrips, 

 weaker preparations will prove effective. Cabbage-worms, and some other insects 

 which have soft bodies, can also be successfully treated. It is advisable to make 

 the emulsion shortly before it is used for insects that suck their food. For San 

 Jose scale it is recommended to use i pound of whale oil soap and dilute in pro- 

 portion of one part to six of water. Especially effective in summer to kill young 

 and tender lice. 



Tobacco Water. 



This solution may be prepared by placing tobacco stems or leaves in a water- 

 tight vessel, and then covering them with hot water. Allow to stand several 

 hours or until color of strong coffee; dilute the liquor from 3 to 5 times for sucking 

 insects. For aphis and soft bodied insects; not so effective as whale oil soap or 

 kerosene emulsion. 



Sticker. 



Resin 2 pounds 



Sal-soda (crystals) i pound 



Water 1 gallon 



Boil until of a clear brown color^i to i^ hours. Cook in iron kettle in the open. 

 Useful for onions, cabbage and other plants hard to wet. Add this amount to each 

 50 gallons of Bordeaux. For other plants add this amount to each 100 gallons 

 of the mixture. This mixture will prevent the Bordeaux from being washed 

 off by the heaviest rains. 



Whale-oil Soap. 



Dissolve in hot water if wanted quickly. For use on dormant trees for San 

 Jos6 scale dilute 2 pounds to i gallon water; for summer use on scale or aphis i 

 pound to 5 to 7 gallons water. 



Maxwell Dust-spray. 



I bbl. fresh lime. 

 25 lbs. copper sulfate. 



5 " concentrated lye. 

 25 " powdered sulfur. 



6 " Paris green. 



