In 1979, farmers reported they applied 22 million pounds (active ingredient) of insecticides in 30 million acre- treatments on 6.5 million acres of cotton. This consisted of 9.2 million pounds (a.i.) in 19.8 million acre-treatments of single material applications and 12.8 million pounds (a.i.) in 10.2 million acre-treatments of tank mixes. In 1979, an average of 4.6 insecticide applications were made per treated acre with 3.4 pounds of active ingredient being applied. Of the 30 million acre-treatments, 4.6 million were in the Southeast, 10.6 million in the Delta, 8.4 million in the Southern Plains, and 6.3 million in the Far West. The primary insecticides used were methyl parathion, chlordimeform, permethrin, EPN, and fenvalerate. The percentage of planted acres treated, the number of times insecticides were applied, and the total amount of insecticides applied to cotton in 1979 showed a decline from previous years.