Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Clickable Guide

Interactive image map to choose major taxa Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar

Upcoming Events

National Moth Week was July 19-27, and the Summer 2025 gathering in Louisiana, July 19-27

Photos of insects and people from the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2024

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Species Neochetina bruchi - Chevroned Waterhyacinth Weevil

Representative Images

Weevil - Neochetina bruchi Weevil - Neochetina bruchi Weevil - Neochetina bruchi BG2376 E9077 - Neochetina bruchi Florida Beetle for ID - Neochetina bruchi Florida Beetle for ID - Neochetina bruchi Snout 31 - Neochetina bruchi Snout 31 - Neochetina bruchi

Classification

Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea
Family Brachyceridae
Subfamily Erirhininae (Marsh Weevils)
Subtribe Stenopelmina
Genus Neochetina (Waterhyacinth Weevils)
Species bruchi (Chevroned Waterhyacinth Weevil)

Explanation of Names

Neochetina bruchi Hustache 1926

Size

♂ 3.5-4.5 mm, ♀ 4.1-5.0 mm(1)

Range

introduced into the se US (e.TX-FL-SC) & CA - Map (2)

Habitat

coastal habitats

Food

host: Water Hyacinth (Eichhornia crassipes, Pontederiaceae)(3)

Life Cycle

Eggs hatch in 7-17 days, depending on temperature. Three instars, larval stages take from 36 to 90 days; reports vary. Larvae feed and develop in the petioles. Fully grown larvae move to the water, build a cocoon and pupate near roots, from which they probably take oxygen. Adults are nocturnal. Females lay about 200 eggs.

Remarks

Introduced intentionally into FL in 1974 to combat Eichhornia crassipes; native to Argentina and bordering countries

Internet References

Fact sheet(3)

Works Cited

1.Weevils of South Carolina (Coleoptera: Nemonychidae, Attelabidae, Brentidae, Ithyceridae, and Curculionidae).
Janet C. Ciegler. 2010. Clemson University, Clemson, S.C. 276 pp.
2.Global Biodiversity Information Facility (GBIF)
3.Biological control: A guide to natural enemies in North America
Contributed by v belov on 6 September, 2009 - 1:11pm
Additional contributions by Beatriz Moisset, Mike Quinn
Last updated 6 July, 2023 - 1:51pm

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2025 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact