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18 March 2022 Effect of Gerstaeckeria bifasciata (Gerstaecker, 1860) (Coleoptera: Curculionidae: Cryptorhynchinae) Herbivory on a Globose Cactus in Guanajuato, Mexico
Dalia Segura-Venegas, Cecilia L. Jiménez-Sierra
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Abstract

This is the first scientific report of the behavior of adult Gerstaeckeria bifasciata (Gerstaecker, 1860) and the damage they cause on the globose cactus Stenocactus obvallatus (DC.) A. Berger ex A.W. Hill (Cactaceae). During 2017, we surveyed a population of S. obvallatus (N = 337 plants) in Tierra Blanca, Guanajuato, Mexico, recording the damage that they presented in their stems. A year later, a second survey was carried out, recording survival or death of the plants. Although 86% of plants showed ribs damaged by this weevil in the first census, only a small percentage of them died (5.64%). Our study suggests that S. obvallatus has evolved mechanisms that allow it to tolerate herbivory by this weevil, as we recorded G. bifasciata adults feeding from both caulinary (ribs) and reproductive structures (floral buds and flowers) of S. obvallatus.

Dalia Segura-Venegas and Cecilia L. Jiménez-Sierra "Effect of Gerstaeckeria bifasciata (Gerstaecker, 1860) (Coleoptera: Curculionidae: Cryptorhynchinae) Herbivory on a Globose Cactus in Guanajuato, Mexico," The Coleopterists Bulletin 76(1), 95-100, (18 March 2022). https://doi.org/10.1649/0010-065X-76.1.95
Received: 13 March 2021; Accepted: 23 January 2022; Published: 18 March 2022
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KEYWORDS
endemic
host
plant-insect interaction
population dynamics
weevil
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