12 
infested should be turned under with the plow and not planted until 
late in the season to other crops. The eggs thus buried will hatch in 
the soil, and, as a rule, the young insects will find plenty of avenues of 
escape; but if there be no near-by crops, they will ultimately perish, 
since they are unable to travel far at this stage. In the same way 
trap crops may be planted between wheat and corn to protect the lat- 
ter from the migrating bugs from wheat fields after harvest. 
(3) Rotation.—If a system of rotation could be adopted which would 
entirely disassociate small grains from corn, very little damage from 
the chinch bug would ever be experienced, at least to the latter crop. 
Following out this idea would mean the planting of a farm to corn one 
year and to wheat and small grains the next or some similar system 
of rotation. 
(4) Plowing as a check.—In checking the midsummer migrating bugs 
some good may also be done by turning under the first rows of corn 
or other crop attacked. To have any practical value, however, the 
plowing must be done very deeply, or many of the bugs will escape. 
(5) Spraying.—The first rows attacked by the bugs may also be 
sprayed with a very strong oily insecticide, such as kerosene emul- 
sion—a mixture strong enough even to kill the corn itself and the 
bugs along with it. 
(6) Protecting furrows.—The making of protecting furrows, as recom- 
mended for the army worm, is also applicable to the chinch bug. The 
bugs which collect in the furrow may be killed either by dragging a 
log along or by thoroughly wetting with the kerosene and water 
mixture. 
(7) Coal-tar barriers.— A good deal of effort has been made in some 
places to protect fields by placing about them lines or barriers of coal 
tar. Where this is done the line of tar must be renewed several times 
aday. At intervals along it holes may be bored, in which the bugs 
will accumulate and may be destroyed. All that is necessary is to 
put a single straight line of tar in front of the migrating bugs and 
make holes on the side of attack with a post auger at distances of 8 or 
10 feet close to the tarred line. Various other forms of barriers will 
easily suggest themselves, such as putting a line of boards about a 
field and smearing it with tar or combining the tar with the furrow 
method. 
Promptness and vigilance are the essentials in any of these remedial 
operations. 
(8) Control by fungous diseases.—A vreat deal of work has been done 
of late years in the use of various fungous diseases as a means of con- 
trolling the chinch bug. It was early observed that the chinch bug 
was frequently exterminated by a disease, and the idea naturally sug- 
gested itself that this disease could be collected and disseminated at the 
proper time and result in quick riddance of this pest. Appropri- 
132 

~ ee 
