The Twig Wasp of Cork Oak—Its Biology and Control

@article{Bailey1966TheTW,
  title={The Twig Wasp of Cork Oak—Its Biology and Control},
  author={Stanley Fuller Bailey and Lionel A. Stange},
  journal={Journal of Economic Entomology},
  year={1966},
  volume={59},
  pages={663-668}
}
Cork oak ( Quercus suber L.), the principal source of commercial cork, was introduced to this country in 1858 from acorns sent from Spain. For Many years no pests were noted. In 1918 the twig wasp Plagiotrochus suberi Weld, not described until 1926, was observed injuring the tree in California. It has since become a pest, particularly when the cork oak is planted as an ornamental or shade tree. The larvae feed within a jellylike matrix in the small twigs. The resulting dead twigs on the… 
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