CONTROL OF ARGENTINE ANT IN CALIFORNIA. 



29 



expensive of all containers. They have, however, certain drawbacks. 

 They are prone to leak and wherever the arsenical sirup drips on the 

 bark of a tree injury follows. Therefore it has been found advisable to 

 hang paper sacks to the trunk or main branches so that no sirup will 

 drip on the tree. During the rainy season the unprotected paraffined 

 sacks as used in California collect water and do not stand up well. 



Fig. 11.— a parairincd spice tin on tree trunk. 



Ants, however, are for the most part inactive at that time, so control 

 is seldom necessary during the winter. One great advantage of paper 

 bags is that feeding by the ants or crystallization of sirup is quickly 

 detected without removal and opening. Paraflined drinking cups 

 or other parafTined containers on the market could l)e used in orchards 

 for holding ant sirup. 



