MAINE) AGRICUI^TURAI, EXPERIMENT STATION. 191O. 435 



This is the strength ordinarily used for the destruction of in- 

 sects upon plants. For larger or smaller quantities, prepare 

 in the same proportions. 



Sometimes the emulsion is not perfect and a little oil rises 

 to the top. In such cases, if the last in the barrel or tank is 

 pumped out upon the foliage, it is likely to burn it. So it is 

 advisable, unless the emulsion is of good quality, to throw out 

 the last few gallons, making no use of it. 



It is best to dilute and apply kerosene emulsion as soon as it 

 is prepared. 



Avoid using alkali or any hard water in making the emul- 

 sion, as it will cause the oil to separate and rise to the top. Any 

 clean, soft water will usually give good results. 



Formula 8. misciblE oils. 



There are several miscible oils upon the market which may 

 be added directly to water forming a milky emulsion at once. 

 In the preparation of any of these, such as "Scalecide," or 

 "Target Brand Scale Destroyer" or "Killoscale," add the oil 

 directly to the water with a little stirring. One gallon of the 

 miscible oil in 30 to 50 gallons of water will make a mixture, 

 which in most cases will be strong enough to kill plant lice, if 

 thoroughly applied. 



Formula 9. whaeE-oie or fish-oil soaps. 



The so-called whale-oil or fish-oil soaps which are quite 

 extensively used for the destruction of plant lice, will usually 

 be effective if thoroughly applied in the proportion of one pound 

 of the soap to each six or eight gallons of water. There are 

 numerous brands of these soaps upon the market. Among 

 those that have been used quite successfully are Good's Whale- 

 Oil Soap and Bowker's Tree Soap. 



Formula 10. soap solution. 



Washing powder Yz. pound 



Water 3 gallons 



The soap dissolves readily in the water. 



