Studies on the Progress of Boll Weevil Infestation at Various Distances from Hibernation Quarters

Abstract

The rapidity of boll weevil (Anthonomus grandis Boh.) spread was determined by a study of the degree of infestation, and screen trap collections of weevils in cotton at various distances from hibernation quarters. The catch on traps located in fields not planted to cotton, but in the vicinity of cotton, indicates the degree of movement from field to field. Shortly after the peak of catch occurs on these screen traps in the non-cotton fields, distribution of weevils has become general throughout such sections regardless of what the previous infestation in cotton has been; and there are present a considerable number of weevils to go into hibernation at places where favorable shelter occurs.