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The biology and host specificity of Oxicesta geographica F. from Romania, Hungary, and Southwestern Russia were studied to evaluate the potential of this moth as a new biological control agent of leafy spurge, Euphorbia esula L., “complex” in North America. This oligophagous, multivoltine tent caterpillar is common on perennial spurges in southeastern Europe and Asia Minor and prefers dry, open sites. Results of no-choice feeding tests with first instars on 93 plant species and biotypes, distributed in 33 families, show that O. geographica completed its life cycle mainly on plants of Euphorbia , subgenus Esula , and occasionally fed and developed on species in other subgenera of the genus. Studies of late instars did not show any important extensions of the host range.

environmental entomology

Biology and Host Preference of Oxicesta geographica (Lepidoptera: Noctuidae) Candidate Agent for Biological Control of Euphorbia esula Complex (Euphorbiaceae) in North America