MEASURES FOR INSECT CONTROL 317 



in large doses. It may be used as a spray or in a dry form 

 and is applicable to currant bushes or other kinds of fruit, 

 for saw-fly larvte and other leaf-feeding insects where it is 

 undesirable to use arsenic. 



Arsenical Bran Mash. — This is used as a bait for cut worms 

 and other insects which endanger vegetation and which it is 

 desirable to kill before the vegetation has been attacked. 

 Formula as follows: 



Bran 25 pounds 



Paris green ^ pound 



Cheap molasses 1 quart 



Water, as needed to moisten. 



For small quantities use: 



Bran 1 quart 



Paris green 1 teaspoonful 



Cheap molasses 1 tablespoon ful 



Water, as needed to moisten. 



For grasshoppers the attractiveness of this bait is very 

 much increased by the addition of lime juice or orange or 

 lemon flavor. 



Contact Insecticides. — Insecticides of this group depend 

 upon immediate contact with the insects to be affected, . 

 different kinds of sprays, direct applications and the use of 

 fumigants which are distributed to the insects to be reached. 



Lime-sulphur wash is the most important of the insecti- 

 cides now in use against the scale insects, especially the 

 San Jose scale. The commercial lime-sulphur preparations 

 on the market generally may be secured at seed-stores 

 or from dealers in nursery or orchard supplies and depended 

 upon as containing the correct proportions and if used 

 according to directions should give very certain results. 

 These can be secured at reasonable prices and are often 

 preferable to the solutions of home preparation. How- 

 ever, directions for the preparation of the compound may be 

 of service and two formula? will be given, one for the concen- 

 trated solution to be diluted when used and the other for 

 immediate use. 



