Heliothis phloxiphaga is a species of moth of the family Noctuidae. It is found in the United States and southern Canada. It feeds on a variety of plants, and the caterpillars are considered pests to certain trees, including Ulmus, Malus, and Prunus. Adults are on-wing during the summer.

Heliothis acesias and Heliothis australis were previously grouped with H. phloxiphaga.

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