Life-table of Odoiporus longicollis Oliver (Coleoptera: Dryophthoridae) under varying temperature ranges, an in-vitro study

Abstract

The age specific and stage specific life table of Odoiporous longicollis when exposed to various temperatures (ranging from 15-42ºC) reveals that there is a strong influence of temperature on the very existence of this weevil. The survivorship exhibit a parallel pattern over all the temperatures delivered and it tend to decline as the age proceeds with no indispensable mortality at any stage or age. The developmental stages such as egg, grub, pupa and the adult up to the age of two months showed highest survivor fraction and lowest apparent mortality, mortality ratio, survival ratio and Kvalues at lowest temperatures. The study displays its significance to determine the optimum temperature for the laboratory rearing of the pest and ensures zero mortality other than due to aging. A simulation model was also generated based on global temperature to predict the possible locations where the insect can be a major pest.