Chevroned Waterhyacinth Weevil

Chevroned Waterhyacinth Weevil

Neochetina bruchi Hustache
[Coleoptera: Curculionidae]

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The biology of this weevil is very similar to that of Neochetina eichhorniae. They often occur together and they can be difficult to separate the two species. Adults can be separated with some practice. DeLoach and Cordo (1976a, 1976b) studied the life cycle in Argentina.


Neochetina bruchi was released into the United States in 1972 along with N. eichhorniae and Sameodes albiguttalis (Perkins 1973).


Neochetina bruchi was released and established in the U. S. in Florida.


Collecting and relocation of this weevil is very similar to Neochetina eichhorniae.

Weeds Affected

Neochetina bruchi feeds on water hyacinth.


DeLoach, C. J., and H. A. Cordo. 1976a. Life cycle and biology of Neochetina bruchi, a weevil attacking waterhyacinth in Argentina, with notes on N. eichhorniae. Ann. Entomol. Soc. Am. 69: 635-642.

DeLoach, C. J., and H. A. Cordo. 1976b. Ecological studies of Neochetina bruchi and N. eichhorniae on waterhyacinth in Argentina. J. Aquat. Plant Manage. Soc. 14: 53-59.

Perkins, B. D. 1973. Potential for waterhyacinth management with biological agents. Proc. Tall Timbers Conf. Ecol. Anim. Control Habitat Manage. 4: 53-64.


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