Injurious insects : how to recognize and control them / by Walter C. O'Kane.
- Walter Collins O'Kane
- Date:
- 1912
Licence: In copyright
Credit: Injurious insects : how to recognize and control them / by Walter C. O'Kane. Source: Wellcome Collection.
82/456 page 62
![such as the shot-hole borer. The limbs or trees removed should be converted at once into cordwood and burned. Otherwise, little will be gained by their removal. Use of Traps The kinds of traps are legion, and range all the way from chips or stones placed in the garden for squash bugs to hide under to more or less ingenious devices for capturing roaches and flies. Many are efficient, though it often seems that new individuals make their appear- ance about as fast as the others are caught. At best the total numbers merely are reduced. A variation of traps is seen in the use of tra]) crops. By this device some kind of plant is introduced that the pest is fond of, and after the insects have collected on these plants, they are destroyed by poisoning, burning, or by spraying them with some oil or corrosive, such as pure kerosene. In other cases the trap precedes the regular crop, and thus diverts attack from the more valuable plant. Thus, early kale is sown in fields that later are to be set out to cabbages, in order to attract the overwintering adults of the harlequin cabbage bug.](https://iiif.wellcomecollection.org/image/b28052249_0082.jp2/full/800%2C/0/default.jpg)
