REMEDIAL MEASURES. 



67 



NICOTINK SULPHATK. 



Some seeds were soaked overnight in nicotine sidphate and dried 

 before planting. This sulphate, which is advertised to contain 40 

 per cent nicotine, is a dark, viscous liquid and smells very strongly 

 of nicotine. Wlien used pure it tended to rot many of the seeds- 

 The best germination results were obtained when it was diluted 

 about one-half with water. The summary shows that it could not 

 be recommended as a deterrent. 



Table IX. — Experiments irith nicotine sulphate, as <i deterrent against the sugar-beet 



irirewornt . 



FREE NICOTINE. 



Seeds were soaked in nicotine solution overnight. This fluid, 

 which contains free nicotine in water, has a very sharp nicotine odor 

 and is also 40 per cent nicotine. As the results obtained in two out 

 of the three tests were negative, its value as a deterrent must be 

 slight. Some of the bean seeds were riddled by the wire worms. 

 The results are shown below: 



Table X. — Experiments with free nicotine as a deterrent against the sugar-beet wireworm. 



Cresol, so-called coal-tar creosote, was tried in these experiments 

 because it is used quite successfully in keeping dermestid larvae out 

 of collections. It is a thin liquid, rather dark in color, and with a 

 strong tarry odor. The seeds were soaked in it overnight. The 



