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. 
■ •* *■ ■■■■■■ &■' v^l ■• 
1 P 1 
"T,? ' ; - c 
IftfiFf^f&itoh, 
Fig. 11.— A paraffined 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. Paraffined drinking cups 
or other paraffined containers on the market could be used in orchards 
for holding ant sirup. 
