EXPERIMENT STATION BULLETINS. 279 



I find that the eggs are in many cases being destroyed by parasites — or we 

 step in to exterminate them, they will do serious harm the coming spring. 

 I have never found anything equal to the kerosene emulsion to destroy 

 these pests. I use a dilution of one of kerosene to fourteen parts of water, 

 or in other words add to my emulsion a little ( more than its volume of 

 water. This will not harm the tender buds indeed, the abundant soap 

 seems to invigorate), but will destroy the eggs if unhatched, and all the lice 

 that it strikes. I prefer to use it just as the buds are opening, as it is 

 more easily applied and is used with more economy before the foliage 

 puts out. It should be applied with a force pump, as dashing it into the 

 trees with force makes the application more thorough and its use more 

 effective. 



KEKOSENE EMULSION FOE CATTLE LICE, ETC. 



In Bulletin No. 7 of the Iowa Experiment Station, Prof. C. P. Gillette 

 reports the destruction of the hog louse, Hrematopinus suis, by use of the 

 kerosene emulsion. He used a 12-| per cent, emulsion, applied the liquid 

 with a force pump, and reports most excellent success, in not only killing 

 the lice but in destroying the nils, or eggs, as well. Of course, if thought 

 better, the hogs could be washed, by use of cloth or brush, instead of being 

 sprayed with a pump. Such washing would be of service aside from the 

 destruction of the vermin, as the soap solution gives renewed vigor to 

 the skin. In his Bulletin No. 11 the same gentleman reports the same 

 treatment for the sheep tick. An eight per cent, emulsion was used and 

 the sheep were dipped and thoroughly drenched with the emulsion. The 

 remark is made that free oil on top of the emulsion did some injury to the 

 first sheep treated, causing some of the wool to come off. The expense 

 of material was less than two cents per sheep. The man who did the 

 work stood in the vat and received no harm. We shall dip our sheep this 

 spring, using a 12^ per cent, emulsion, and as there will be no free oil we 

 shall expect perfect success and no harm. 



In Bulletin No. 5 of the Iowa Experiment Station, Prof. C. P. Gillette 

 detailed some successful experiments in destroying lice on cattle, by use of 

 Kerosene Emulsion. He used an eight per cent, emulsion and applied it 

 by use of a pump the same as for the hogs. 



The past winter we have tried this remedy thoroughly and prefer it to 

 our old stand-by, the tobacco decoction as given many times in our reports, 

 and also last year in Bulletin No. 58. The Kerosene Emulsion kills not 

 only the mature lice, but the nits as well, so that it does not need to be 

 repeated so frequently as does even the tobacco decoction. Besides, the 

 soap wash seems to make the hair fresher, and to give a general vigorous 

 appearance to the coat of the animal. We prefer the soft soap emulsion, 

 as we believe the abundance of soap to be beneficial. We diluted the 

 emulsion so that from one eighth to one tenth of the whole was kerosene. 

 At one time we treated thirteen animals whose average weight was 800 

 lbs. We washed each animal thoroughly. It only took 57 minutes to do 

 the whole. The amount of the liquid used was about ten gallons, and the 

 effect in destroying the lice, and in improving the coat of the animal, was 

 marked. 



We found it easier and quicker to wash thoroughly with a brush. This 

 also mats the hair less than does, washing with a cloth. We see that the 

 cost is very slight. One gallon of kerosene and two gallons of soft soap, 



