58 



believe that in most seasons, on grass land, the hopper-dozer would repay 

 many times the slight expense of its use. 



In certain localities grasshoppers do much damage to grain fields. 

 There seems to be but one method of controlling them, aside from reducing 

 their numbers in the neighboring grass lands, and that is by poisoning 

 them with Criddle-mixture. The formula for this preparation is given 

 below. A tub of the mixture is driven along the edges of the grain field and, 

 by means of paddles, the substance is scattered as far into the field as it can 

 be thrown, fifteen feet or so. The hoppers will come from all the neigh- 

 borhood to feast upon it, and tlie most of those infesting the field will be 

 killed. Grasshoppers seem to prefer the mixture to any vegetation, and as 

 they eat it more readily when it is damp, the application should be made 

 late in the afternoon if the day is hot. 



This method of control has been much used throughout the Canadian 

 and United States "West, and has apparently given the best satisfaction. 



Criddle-mixture. — One pound of Paris green and two pounds of salt 

 dissolved in water are thoroughly mixed with 100 pounds of fresh horse- 

 droppings — about five 3-gallon pails. It is most conveniently made in half- 

 barrel lots. 



The Pea Weevil (Bruchus pisorum Linn). This is a small beetle one- 

 fifth of an inch long, brownish, with two black spots at the end of the body. 

 It feeds within the peas, and upon emerging from them leaves the well- 



>s^/< 



The Bean Weevil CBruchus obtectusi: a, b3e;le; b, larva; c. pupa — greatly enlarged. 

 (CWttenen, Yearbook, 189S, U.S. Dept. ol Agr.) 



known round holes. The injury from this pest in large pea-growing sec- 

 tions has been very great. The germinating power of the seed, is greatly 

 reduced and the value diminished for any purpose. 



