The pink bollworm, Pectinolohora gossypiella (Saunders), is particularly vulnerable during the periods of early season establishment in the current year's crop and late in the season during development of the diapause generation, as well as when the insect is in the overwintering cycle. The use of plant growth regulators to remove early-season cotton flower buds has potential for extending the period of pink bollworm suicidal emergence by eliminating host material for reproduction. However, delayed crop maturity and potential yield losses may occur if treatments are not properly timed or rates of application are excessive. The use of plant growth regulators late in the season to selectively eliminate late-season bolls that do not contribute to yield but provide a source of host material for development of the overwintering pink bollworm generation has been well documented. This practice has been accepted by many cotton growers.