THE HOP FLEA-BEETLE. 
89 
This method captures a satisfactory percentage of the beetles and 
should be comparatively inexpensive. But unfortunately the re- 
peated operations which are necessary bring the cost to a high figure. 
It cost Mr. Hulbert last year approximately $1.25 per acre for each 
operation. He went over his vines six times, and some parts of the 
yard eight or ten times. He expected to go over it at least twice 
more, so that the total cost would be from $10 to $15 per acre. 
In figure 19 a portion of a hop field is shown which illustrates the 
tarred "boards" in place for use. The flea-beetles arc dusted off 
of the vines upon these tarred receptacles with wisps of hay. as 
Fig. 19. — Portion of hop field with tarred hoards in place.. Flea-beetles are dusted with 
wisps of hay from the vines onto tarred hoards. (Original.) 
described above. All of the vines were tanglefooted, but the flea- 
beetles went up the poles and crossed over on the wires overhead until 
the tanglefoot was applied. Plate VII illustrates the method of 
capturing the hop flea-beetle on tarred horse sledges, also by shaking 
the vines. Millions were captured in this way. 
CLEAN CULTIVATION. 
Frequent stirring of the soil and other cultural operations >eem, 
as yet, to be of no appreciable help, according to Mr. Quayle, and the 
kind of soil also seems to have little or nothing to do with the abun- 
