INJURIOUS INSECTS. 97 



their way, which should be turned back as soon as filled with 

 bug's and new furrows made. Fences of boards six inches 

 high with the upper edge kept covered with tar will keep them 

 out, but holes in the ground should be made at intervals along 

 the line of the boards, which when full of bugs should be filled 

 in with earth, and new holes made. A dusty headland 

 or road is very difficult for them to get through. If they 

 finally reach the corn, they will readily succumb to kerosene 

 emulsion. Much is being done to rid grain fields of this pest 

 by infecting the bugs with disease. This works most rapidly 

 in moist weather, but other remedies should not be put aside 

 for this one. 



Bean and Pea Weevil (Bruchus sp.) The insects known as 

 weevils are quite common in some sections. They work in the 

 seed of beans and peas. The adult insects are small beetles 

 which lay their eggs in the flowers, where they soon hatch, and 

 the young larvae eat their way into the immature seeds. The 

 hole by which the larva enters the seed grows completely over, 

 so that the seed appears unimpaired externally. In the seed 

 the larva does not touch the germ, though it may eat up a 

 large part of the starch. The larva undergoes its changes in 

 the seed, and when these have been completed the beetles emerge 

 through quite large holes in the shell of the seed. While seed 

 that is infested may germinate, it forms only weak plants that 

 are very sure to fail to mature a full crop. Similar insects 

 also attack corn. There is another species that breeds in 

 stored grain, peas and beans, etc., but it is not common as yet. 



Remedies. These insects are generally somewhat local in 

 range. Whenever any locality is infested the date of planting- 

 should be delayed two weeks, by which the beetles fail to find 

 the crop ready when they are ready to lay their eggs. This 

 trouble generally comes from sowing infested seeds. These 

 may be separated from the good seed by throwing them into 

 water, when the good will sink, but those infested will float. 

 Another method is to treat the seed with carbon bisulphide, as 

 recommended under that head. If the seed is kept over two 

 years the beetles will have come out. The species that breeds 

 in the grain is mosteasily destroyed and kept out of theseed by 

 using bisulphide of carbon, as recommended. 



Squash Vine Borer (Aegeria cucurbitce.)— The squash vine 



