3B2 
Journal of Agricultural Research 
Vol. XI, No. 8 
upon the trees. When a branch has become infested, it should be re- 
% moved and burned, as the borers will complete their development even 
in perfectly dead and dry wood and later infest other trees. Fig-wood 
prunings should always be destroyed, and never allowed to remain long 
in or near the orchard. 
Freezing of the bark is likely to be followed by borer attack in the 
branches affected, and such branches should therefore be cut off and 
the surface of the cut painted as above recommended. When the bark 
becomes diseased or bruised, the affected area should be removed with 
a sharp knife, cutting square across to the sound wood, and coating with 
a protective paint so the bark will heal perfectly. 
Trees already heavily infested with borers in the trunk, may as well 
be at once cut down and every scrap burned, as it will be practically 
impossible to save them and they will be a source of infestation and a 
menace to the healthier trees. Trees which are split through the head, 
those which are in a dying condition from any cause, and the volunteer 
trees which so persistently spring up from the roots of some varieties 
of older fig trees grown in southern Louisiana, should also be cut down 
and burned. 
While it is best, where the infestation occurs only in certain branches, 
to remove the infested branches entire, the borers may be dug out of 
highly prized individual trees if the infestation has not progressed too 
far and its area is limited. Some good may also be accomplished, in 
such cases, by destroying the eggs with a knife or an awl. It would 
first be necessary, however, to become familiar with the appearance of 
the egg punctures and eggs. Yard trees should first of all, of course, 
be kept in a healthy condition in order to prevent attack by the borers. 
Oviposition may largely be prevented, in the case of a few yard trees, 
by insheathing the trunk and larger branches with wire netting. The 
screen would have to be kept in place practically throughout the year. 
The borers in some cases may be killed by injecting carbon bisul- 
phid into the tunnels and plugging the openings with putty, but this 
method is impracticable where the infestation is severe and well 
advanced. 
