IPS Bark Beetle Attacks and Brood Development on a Lightning-Struck Pine in Relation to its Physiological Decline
Abstract
A study was made of the attacks and brood development of Ips calligraphus (Germ.), Ips grandicollis (Eichh.), and Ips avulsus (Eichh.) on a large lightning-struck pine tree to determine how these activities were affected by certain factors associated with the physiological decline of the tree. Results show a definite relationship between oleoresin exudation rate (O.E.R.) and incidence and success of Ips attacks. No attacks succeeded where O.E.R. exceeded 0.1 ml/hr. from a standard wound. Moreover, the incidence of attack was less where O.E.R. was greater than 0.1 ml/hr. Inner bark moisture limited brood development only where severe dessication occurred. The pH of the inner bark was within the range found on normal, healthy trees. An hypothesis concerning Ips bark beetle invasion and colonization of lightning-struck pine trees is offered.Downloads
Published
Issue
Section
License
Copyright for any article published in Florida Entomologist is held by the author(s) of the article. Florida Entomologist is an open access journal. Florida Entomologist follows terms of the Creative Commons, Attribution Non-Commercial License (cc by-nc). By submitting and publishing articles in Florida Entomologist, authors grant the FOJ and Florida Entomologist's host institutions permission to make the article available through Internet posting and electronic dissemination, and to otherwise archive the information contained both electronically and in a hard printed version. When used, information and images obtained from articles must be referenced and cited appropriately. Articles may be reproduced for personal, educational, or archival purposes, or any non-commercial use. Permission should be sought from the author(s) for multiple, non-commercial reproduction. Written permission from the author(s) is required for any commercial reproduction.