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Evidence of Inherent Resistance to Dioryctria Infestation in Slash Pine

Tree improvement workers are interested in developing strains of pines resistant to destructive insects. The objectives, methods, possibilities, and limitations of pest-resistance improvement in trees have been discussed thoroughly by Holst and Heimburger (1955), Schreiner (1960), and Soegaard (1964). We shall present evidence of resistance of individual slash pines, Pinus elliottii Engelm., to cone and stem infestation by Dioryctria spp. Lepidoptera: Phycitidaei. In these studies, mature cones were attacked by Dioryctria abietella (D. & S.) and D. amatella (Hulst), whereas stem infestation was by the latter species only.

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Author(s): Edward P. Merkel, G. W. Bengston, A. E. Squillace

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1965