Determination of the Life Cycle of <I>Scyphophorus acupunctatus</I> (Coleoptera: Curculionidae) under Laboratory Conditions
Abstract
In this study of the development cycle of Scyphophorus acupunctatus Gyllenhal, during the month of Feb the incubation period of eggs averaged of 5.9 d. There were 6 instars, and larval development was completed in an average of 34.9 d. Adults lived an average of 413.8 d. During Sep, eggs hatched in 5.5 d, and there were 8 instars, lasting 54.2 d; adult longevity averaged of 433.7 d. There were 7 instars. The size of the head capsule was 0.7 mm for L1 and up to 2.8 mm for L7. Measurements of head capsule width used to determine instar in the field fell into 9 numerical groups, indicating there are 9 well-defined larval stages for S. acupunctatus. There is high mortality in the egg stage and of larvae in the first stages; while in the final larval stages and in the emergence of the adults there is a long period of stability in which the mortality is reduced to the minimum, and increases noticeably at the end of the adult stage.View this article in BioOne
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.