Insecticides . 1 3 



Pyrethrum (Buhach), continued. 



3. Dry, diluted with flour or any light and fine pow- 

 der. The poison may be used in the proportion of i part 

 to from 6 to 30 of the diluent. 



4. In fumigation. It may be scattered directly upon 

 coals, or made into small balls by wetting and molding 

 with the hands and then set upon coals. This is a de- 

 sirable way of dealing with mosquitoes and flies. 



5. In alcohol. Dissolve about 4 ounces of powder in i 

 gill of alcohol, and add 12 gallons of water. 



6. Decoction. Whole flower heads are treated to boil- 

 ing water and the liquid is covered to prevent evaporation. 

 Boiling the liquid destroys its value. 



Good insect powder can be made from Pyretfirum roseum, 

 and probably also from P. cinerari&folium, which is grown 

 in the home garden. 



Quassia. Boil 4 ozs. of quassia chips 10 minutes in a 

 gallon of water ; strain off the chips and add 4 ozs. of 

 soft water, which should be dissolved in it as ii: cools. 

 Apply with syringe or brush. 10 or 15 minutes after it has 

 been applied, give the tree a good syringing with clean 

 water. For plant lice. 



Resin soap. Ingredients for one barrel of 50 gallons : 10 

 pounds caustic soda, 98 per cent. ; 10 pounds potash ; 40 

 pounds tallow ; 40 pounds resin. First. Dissolve the pot- 

 ash and soda in 10 gallons of water. When dissolved, 

 place the whole amount in the barrel to be used. Second. 

 Dissolve the tallow and resin together. When dissolved, 

 add the same to the potash and soda in the barrel, and stir 

 well for five minutes or so. Leave standing for about two 

 hours ; then fill up with water, stirring well as every bucket 

 of water goes in. Use the following day, i pound to the 

 gallon of water. Apply warm. For scale on deciduous 

 trees in summer. (Californian.) 



Resin and fish-oil soap. 20 pounds of resin, i gallon of 

 fish-oil, 8 pounds of caustic soda, and enough water to 



