Strontium chloride as secondary dietary marker for pink bollworm (Pectinophora gossypiella) mass-reared for sterile insect technique Michelle Walters, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ) ; John Claus, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ) ; Guolei Tang, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ) ; Anna Lowe, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ) ; Nathan J. Moses, University of Arizona ; R. Nelson Foster, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ), Center for Plant Health Science ; Barry U. Barnes, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ) ; Richard Zink, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ) ; Robert Staten, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ), Retired ; F. Rob Anderson, USDA, Animal and Plant Health Inspection Service (APHIS), Plant Protection and Quarantine (PPQ) ; Katherine B. R. Hill, University of Connecticut ; Dominique Ramirez, State of Arizona ; David Klein, State of Arizona ; Doug Marsh, State of Arizona ; Leighton Liesner, Arizona Cotton Research and Protection Council