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A New Cone Midge, Cecidomyia spp. Affecting Slash Pine Cones

In 1976, first-year slash pine (Pinus elliottii Engelm. var. elliottii) cones in a northeast Florida seed orchard developed hypertrophied scales. The same symptoms appeared again in 1977. Dissection of the distorted cones revealed an infestation by cone midge larvae. The 1976 damage was found on both trees treated with carbofuran (Furadan® ) and on untreated trees. In 1977, damage was observed on the same trees as well as Orthene ® -treated trees. Impact data is being obtained to evaluate the necessity for control measures.

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Author(s): Isodore L. Williams, Carl W. Fatzinger

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1977

Section: Session 2: Seed Orchard Technology