32 ORTHOPTERA OF NORTHEASTERN AMERICA. 



this work is not intended as an economic treatise there are four 

 methods of preventing or dealing with a locust outbreak which 

 are practical in application and of low cost. These should be 

 known to every farmer and are briefly stated as follows: 



DESTROYING THE EGGS. This is a preventive measure which is 

 practical when an outbreak is feared in any locality. It may be 

 easily accomplished by either plowing, disking or cultivating in 

 late fall or winter all waste lands such as roadsides, ditch banks, 

 margins of cultivated fields, uncultivated fields and grassy mar- 

 gins along fences. Fields in young clover or alfalfa which can- 

 not be plowed should be thoroughly disked in fall and harrowed 

 in early spring. Stirring the soil to a depth of two or three inches 

 will usually be sufficient, as the eggs are laid in clusters within 

 that distance from the surface and the stirring breaks up the egg 

 clusters, exposes them to their natural enemies or buries them so 

 deep that the young never emerge. 



DESTROYING WITH POISONED BAIT. After the grasshoppers 

 have appeared in numbers they can be killed by a poisoned bait 

 scattered freely about throughout their haunts. Two formulas 

 for this bait have both been used with success. As given by J. J. 

 Davis, 5 they are as follows : 



POISONED BRAN AND SAWDUST BAIT. 



Bran (half and half bran and sawdust, or sawdust alone) 25 Ibs. 



Paris green or crude arsenious oxide 1 Ib. 



Molasses, cheap feeding grade 2 qts. 



Lemons, bananas or oranges 6 fruits. 



Water 1 to 2 gals. 



The poison should be thoroughly mixed with the bran. The 

 water, molasses and finely chopped fruit are then mixed and 

 added to the poisoned bran. Thoroughly mix and add water if 

 necessary. The mixture should be wet so that it will mold in the 

 hands, but should not be soppy. Coarse bran is the best material 

 for making the bait, but the use of half hardwood sawdust and 

 half bran, or of sawdust alone as a substitute for bran, gives very 

 good results. The bait should be scattered broadcast early in the 

 morning, at the rate of seven to ten pounds to the acre. 



THE GRIDDLE MIXTURE. 



This consists of one-half barrel of fresh horse droppings, one pound 

 of Paris green or crude arsenious oxide, or one and one-half pounds of 



""Grasshopper control in Indiana." Circ. No. 88, Purdue Univ., Agri. Exper. Stat., 

 1919, I 8. See also Farmers' Bulletin No. 691. 



