54 THE SUOAR-BEET WIREWORM. 



T.\BLE III. — Experiments with turpentine as a deterrent against the sugar-beet uireworm. 



A glance at columns 6 and 7 of Table III shows that there is little 

 difference between the treated and untreated seeds — too little to 

 jiromise much for this method. 



KEROSENE. 



Kerosene was given a trial as a deterrent m spite of the fact that it 

 gave negative results in the experiments of Comstock and Slingerland. 

 The seeds were treated by soaking in kerosene overnight. The kero- 

 sene in some instances removed part or all of the skin from the seeds. 

 The results are summarized below. 



Table IY. — Experiments unth kerosene as a deterrent against the sugar-beet ■mreworm. 



This table shows that while treated seeds are a little less liable to 

 attack before germination yet in the long run there is little difference 

 between treated and untreated seeds. Germuiation tests carried on 

 at the same time show that kerosene kills some of the seeds, so this 

 would at least offset any benefits which might possibly be derived by 

 protection. 



KEROSENE EMULSION. 



As the pure kerosene showed a weak tendency to keep the wire- 

 worms away temporarily it was thought that if some distasteful sub- 

 stance were mixed with it the combination of the two might be more 

 successful. To this end kerosene emulsion was prepared by usmg 

 whale-oil soap. The seeds were soaked in this overnight and then 



