INJURIOUS INSECTS OF I909 AND IQIO. 93 
directly toward the food-plants, and they had to be continually turned 
away from them. ‘This suggests that possibly a barrier of weeds 
might be placed around a garden in a regular line, thus providing 
the caterpillars hatched outside the garden with food, and so mak- 
ing it unnecessary for them to travel to the flower-beds. Of course, 
these weeds would have to be 
burned in the fall and others 
be set out in the spring some- 
time during the last of May 
or early part of June, and 
the stumps of these weeds 
would have to be destroyed 
imetie fall,-so° that there 
should be no trace of them 
on which the moths could lay 
their eggs at that time of the 
year. 
Fig. 46. Imago of P. cataphracta. Original. 
Summary. 
Provided one’s garden is free of weeds, particularly burdock, 
ragweed, bur-elder and the like, and last season’s growth has been 
carefully removed and destroyed, one can protect an entire garden 
from the attacks of the stalk-borer by a six or eight-inch board 
placed around the outside, the lower edge an inch or more below 
the surface of the ground, and the upper edge three inches above 
the ground; said board to have on the outside a band of some 
material which will either remain sticky or be kept sticky by sep- 
arate applications, from June 1st to August Ist. Tangle-foot has 
proven satisfactory in our experiments. The tangle-foot should be 
put on an inch or so above the ground, so that it could not be 
easily coated with earth by the spattering occasioned in the event 
of heavy showers; and whatever sticky substance is used, it should 
be of such a nature as to either remain sticky, or be kept sticky by 
several applications, from June Ist to August Ist. 
The fact that the larvae show a strong tendency, when within 
about two feet of their favorite food-plants, to go to said food- 
plants directly, suggests that possibly a barrier of weeds might be 
placed around a garden, thus providing the caterpillars outside the 
garden with food, and making it unnecessary for them to travel to 
the flower-beds. These would have to be burned in the fall, of 
