56. 
THE SXJGAK-BEET WIEEWOEM. 
and at the same time not have the disadvantage of causing the seeds 
to rot. This water is procured by allowing a mass of coal tar or 
pine tar to stand in water for some time. The water becomes 
slightly colored and smells very strongly of tar. A very little tar 
will suffice for treating a large amount of water. 
The seeds were treated by allowing them to soak in this water 
overnight, and they were then planted. They smelled quite strongly 
of tar even after they were allowed to dry partially. The results 
obtained are shown m the following summary: 
Table YII. — Experiments ivith tar ivater as a deterrent against the sugar-beet wireivorm. 
Larvae 
used. 
Seeds 
used. 
Seeds attacked. 
Before After 
germina- j germtna- 
Sseds un- 
touched. 
Larvse 
missing. 
Larvse Dura- 
killed by I tion of 
fungus.' ! lest. 
Experiment. 
Check 
Experiment. 
Check 
Experiment. 
Check 
Days. 
In spite of the fact that the table seems to indicate that tar water 
is ineffectual, this method is to be given a more extensive trial next 
spring. 
ASH WATER. 
Ashes have Ions: been used and recommended as a deterrent 
against various insects, and especially wireworms. It has been 
mentioned previously that the beetles appear to be driven out by 
ashes. About the only way that ashes could be used on a large 
scale would be to soak the seeds in water which had been used to 
leach out ashes. This method was used, the seeds being partially 
dried before planting. The following summary shows that any 
benefits which might have been derived from the use of this method 
are too small to be of much importance. 
Table VIII. — Experiments trith ash water as a deterrent against the sugar-beet wireworm. 
Larvae 
used. 
Seeds attacked. 
Seeds un- 
touched. 
Larvae 
missing. 
Larvae 
killed by 
fungus. 
Dura- 
tion of 
test. 
Seeds 
used. 
Before 
germina- 
tion. 
After 
germina- 
tion. 
Experiment 
Check 
Experiment 
Check 
Experiment 
Check 
50 
50 
25 
25 
25 
25 
15 
15 
10 
10 
10 
10 
5 
10 
6 
4 
7 
4 
5 
2 
2 
ti 
1 
2 
5 
3 
2 

2 
4 
2 
1 ! 
7 
2 1 
2 1 
5 
Days. 
20 
20 
30 
30 
30 
30 
