THE COTTON ROOT-LOUSE 



141 



"There are a number, but the plants known as 

 life-everlasting are the most important. There is 

 one," and the entomologist pointed to a plant on 

 the ground. 



FIG. 58. "Life-everlasting are the most important." 



"What are some of the plants on which they can- 

 not live?" they asked. 



"Among our farm crops are oats, rye, barley, 

 wheat, vetch, clover, and peas, and these are all 

 plants which you know well and which you are 

 growing on your farms," the entomologist explained. 

 "When you plant a heavy cover-crop of one of the 



