APPENDIX A. 



USEFUL INFORMATION. 



COST OF INSECTICIDES. 



'"PHE cost of insecticides depends on the local prices of the various ingredients, but 

 1 the following may be taken as average prices p.3r 100 gallons (12 matinds) : 



Es. A. p. 

 Lead arseniate . . . . . . . . .100 



Kerosene emulsion, soft soap . . . . . .300 



hard ...... 300 



Rosin wash . .. . . . . . .300 



compound . . . . . . . .200 



McDougaPs Insecticide ....... 340 



Crude oil emulsion ........ 1 12 



The quantity of insecticide used per acre on various crops is as follows : 



Cotton or Tur ......... 80 to 100 gallons. 



Young Sorghum ........ 60 



Sweet Potato, Groundnut, etc ....... 60 



Coffee .......... 80160 



Tea .......... 75150 



Mustard .......... 60100 



Wheat .......... 5080 



i. Lead Arseniate. 



Paste. One pound in 66 gallons of water with the addition of 3 pounds of lime 

 and 6 pounds of jaggery or gur if available. Stir well before applying. One ounce 

 of paste is the charge for a kerosene tin full of water or for the Knapsack Spraying 

 machine. 



Powder. One pound in 100 gallons of water with 5 pounds of lime and 10 pounds 

 of jaggery or gur. Stir well. The charge for a kerosene tin of water is two-thirds of 

 an ounce, about a teaspoonful. 



One pound mixed well with 20 to 50 pounds of any fine neutral powder, such as 

 lime, ashes, road dust, etc. 



2. Kerosene Emulsion. 



Boil half a pound of sliced bar soap in 1 gallon of water till dissolved. Take 

 off the fire and add 2 gallons of kerosene, agitating or beating the mixture till the 

 kerosene is completely emulsified. This is stock solution to be diluted with 6 to 10 

 parts of water before use. With hard water more soap is required. 



3. Crude Oil Emulsion. 



One gallon of emulsion mixed with 66 gallons of cold water. The charge for a 

 kerosene tin full of Water is half a pint* 



