GRASSHOPPERS AND OTHER INJURIOUS INSECTS OF 1911 AND 1912. 3 



a poison and if human beings accidentally partook of it, or if stock 

 drank it or ate a large amount of forage thoroughly drenched with it, 

 fatal results might follow. Used as above directed, it is safe. See 

 page 22 for account of our experiment in endeavoring to poison stock 

 with this mixture. 



11. For suggestions regarding use of hopperdozers and burning 

 fields, see pages 19, 24, 26. 



12. For discussion of cultural methods, protection of gardens, 

 ets., see pages 23, 26, 33. 



h.ttso 



Fig. 2. Grasshopper conditions in 1910. Crosses indicate pres- 

 ence of g-rasslioppers ; circles, the presence of army worms. 



13. Plowing Against Young Grasshoppers: Young hoppers just 

 hatching may be plowed under in a field by beginning on the outside 

 of the field and working toward the center with the plow. Or a strip 

 a few rods wide can be plowed between the valuable crop and a large 

 tract of unplowed land when grasshoppers are hatching. This will 

 form a barrier rather difficult for very young hoppers to cross, thus 

 giving time to prepare other means to use against them. The above 



