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Species Neochetina bruchi - Chevroned Waterhyacinth Weevil

Weevil - Neochetina bruchi Weevil - Neochetina bruchi Weevil - Neochetina bruchi Weevil - Neochetina bruchi BG2376 E9077 - Neochetina bruchi BG2376 E9077 - Neochetina bruchi BG2376 E9077 - Neochetina bruchi
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea (Snout and Bark Beetles)
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
native to South America, introduced to the US, released in SC-FL-AL-TX & CA to control waterhyacinth
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
first introduced in FL (1974)
Internet References
Fact sheet Bad link (2)