394 



SOUTHERN FIELD CROPS 



the grub or larval stage \vithiii (Fig. 172). The mature in- 

 sect can live for a short time on the tender leaves or grow- 



FiG. 172. — Cotton Square showixc. Boll-t\'eeyil Larv.\ in Position. 

 Natural si?A\ 



ing liuds of the cotton plant, a fact which is important to 

 remember in considering means of coniliating this pest. 



The cotton boll-w(>e^'il does n<.)t cat any plant that is 

 widely grown exccjit cotton. This fact is utilizetl by cie- 

 priving th(> insect, late in autumn, of green cotton ])lants, 

 its only food. 



