Answer:
The decrease in cotton production in the American South during the 1910s was due to the irruption of Boll Weevil.
Explanation:
The boll weevil is an insect native of Central America, which feeds mainly on cotton.
In 1904, the boll weevil was reported in Louisiana and crossed the Mississippi River in 1908, reaching southeastern Alabama. It became the most destructive pest of North America in the mid-1920s, affecting all areas of cotton production in the United States.
During the 1920s, the insect helped to impoverish farmers in the southern United States, already affected by the Great Depression.
