52 SOME INSECTS INJURIOUS TO TRUCK CROPS. 
were rather close together, 10 pounds were used to the acre. Al- 
though the tanglefoot is apparently very disagreeable material to 
apply, it is easily washed off the hands with a little kerosene or even 
with soap and hot water. 
DESTRUCTION OF HIBERNATING BEETLES. 
In poles. — Since a large number of beetles were found hiberna- 
ting in places where they might be attacked, it was believed advisable 
to destroy them. The slivers on the trellis poles, under which the 
beetles were hibernating, were struck with an ax, forcing them back 
Fig. 15. — Killing the hop flea-beetles in the poles. (Original.) 
against the solid wood, and thus either crushing the insects or jarring 
them out, A tarred board was made which fitted close around the 
base of the pole and caught all the beetles which fell down (fig. 15). 
The rotten parts of the pole were chopped off and burned. Any 
beetles which fell out during this operation were caught on the tar, 
and the fire destroyed the rest. This is the most practical way of 
killing the beetles in the poles, as it is cheap and very effective. 
In vine-stubs and string-pegs. — As stated under the head of " Hi- 
bernation," the vine-stubs and string-pegs, which are usually left in 
the field when cleaning up in the fall, may shelter a considerable 
number of flea-beetles. In order to determine whether or not the 
