Table of Contents
Journal of Insects
Volume 2015, Article ID 429579, 5 pages
Research Article

Life History of the Tamarind Weevil, Sitophilus linearis (Herbst) (Coleoptera: Curculionidae), on Tamarind Seed

1Department of Crop Production, Kwara State University, Malete 23431, Kwara State, Nigeria
2Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Nigeria

Received 9 August 2015; Accepted 7 October 2015

Academic Editor: Francisco de Sousa Ramalho

Copyright © 2015 James Adebayo Ojo and Adebayo Amos Omoloye. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The tamarind weevil, Sitophilus linearis Herbst (Coleoptera: Curculionidae), is an important pest of tamarind and other Caesalpinioideae. Investigating its life history is important in the implementation of management strategy. Its life history was monitored daily to understand its developmental biology on tamarind seed following standard procedures under laboratory conditions of 24–30°C temperature, 60–70% relative humidity, and 12L : 12D photoperiod. The egg incubation period lasted 3.17 ± 0.07 days. A mated female of S. linearis laid an average of 165 ± 5.78 eggs during an oviposition period of 86.8 ± 2.47 days. There were four larval instars, with a total larval developmental period of 16 days. The pupal period lasted 8 days, and adult lived 108.5 ± 3.61 days. The overall growth ratio for the four instars was 1.33. There was a regular relationship and significant correlation () between the stages of larval development and head capsule width.