258 AGRICULTURE 



by running a deep furrow across the path of the bugs and 

 destroying them as they fall into it. The fields should be 

 cleaned by burning all rubbish which can shelter the adult 

 bugs through the winter. With many such pests, it is ad- 

 visable to change the crop on a field each year, so that the 

 pests may not so readily find an abundance of their food. 



FIG. 1 68. APPLE WORM OR CODLING-MOTH 



The moth or miller lays the egg, from which hatches the 



larva or worm. 



The apple worm or codling -moth. A widespread pest 

 of apples is the worm (Fig. 168) that works into the core 

 and makes the fruit "wormy." This is the larva of a 

 pretty moth that lays its eggs on the leaves of the apple 

 soon after the blossoming time. The young larvae feed on 

 the leaves before they enter the fruit, into which they 

 bore their way. This is the reason why it is possible to 

 kill nearly all of the young worms by applying a poisonous 



