FUNDAMENTALS OF AGRICULTURE. 



A FIELD OF COTTON DESTROYED BY WILT. 



teristic brown discoloration. The disease is more 

 prevalent in sandy or sandy loam soils, and spreads 

 from year to year as long as cotton is grown. The 

 cotton wilt fungus attacks only cotton and okra ; and 

 the similar wilt of cowpeas, of watermelons, of toma- 

 toes, and of some other plants is due in each case to 

 a different fungus. On land infested with cotton wilt 

 a long rotation which brings in cotton once in four or 



THE SAME FIELD PLANTED WITH A DILLON VARIETY, BRED BY THE 

 U. S. DEPARTMENT OF AGRICULTURE TO RESIST THE WILT. 



