Effect of DDT on Pink Bollworm Populations1

Abstract
Populations of pink bollworm adults, Pectinophora gossypiella (Saunders), were estimated in two sections of a ⅙-acre screened cage by using light traps and moths marked with dye. The populations increased 14.6-fold per generation in the untreated section and 3.8-fold per generation in the section treated with eight spray applications of DDT at the rate of 2.5 pounds per acre.