Chevroned Waterhyacinth Weevil
Neochetina bruchi Hustache
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 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.