INSECTS ATTACKING CEREALS AND GRASSES. 



45 



and not loose." Newly-plowed land is not liked. Moist or wet 

 ground is generally avoided. Closely-grazed meadows and pas- 

 tures are favorite egg-laying ground. The eggs of the Rocky 

 Mountain Locust cannot be found in Kansas, except in the fall 

 following an invasion by adults from the northwest. 



The Red-legged, the Differential and the Two-striped locusts 

 have about the same egg-laying habits as the Rocky Mountain 

 Locust. The Differential occasionally deposits its eggs " under the 

 bark of logs that have been felled on low land." 



3. Destruction of the young or unfledged locusts in the spring 

 may be accomplished in a number of ways. The young locusts, 

 being wingless, are restricted in their range, are confined to the 

 ground, and are usually thickly massed. Burning, by scattering 

 old straw or hay over the infested areas and lighting it; or by 

 means of machines, consisting of long, open grates wuth screens 

 above directing the heat down, and drawn by horses over the 

 fields ; or by dragging a long wire, wrapped in rags which have 

 been soaked in kerosene and ignited, back and forth over the field, 



is effective. Crushing, 

 where the locusts are on 

 hard, smooth ground, 

 by heavy rollei-s, can 

 be often indulged in. 

 Trajyping or catching, 

 by the use of nets, or 

 by ditches or trenches, 

 or by machines, into 

 w'hich the locusts are 

 fanned or sucked, and 

 dropped into kerosene, 

 is sometimes feasible. 

 Poisoning may be ef- 

 fectively used when it 

 is desired to protect a 

 certain limited area, or 

 special crops, fruit- or 

 shade-trees, etc. Paris 

 green, mixed with 20 to 30 parts of flour, and scattered on the ground, 

 destroys many locusts attracted by the flour. Spraying trees, bushes 

 or garden crops with Paris green (see p. 7) can be relied on. 



Fig. 23. a, Diffeeential Locust: b. Two-striped Lo- 

 cust; to show difEerence in markings, when wings are 

 folded. ( See page 42. ) 



