Lifecycle of Acentria ephemerella

(click to enlarge)

Acentria eggs on a milfoil leaflet

More Acentria eggs, a little older

Acentria eggs ready to hatch

A 1st instar (newly hatched) larvae


1st instar mining in a milfoil leaflet

A larger caterpillar (~3rd instar)

A few caterpillars of different sizes

An Acentria "retreat" on a milfoil tip


Adult male moth (dorsal view)

Adult male moth (ventral view)

Typical adult female (on top of water)

A very rare winged female (submerged)


Adult moths mating

A female moth laying eggs on milfoil leaf

For more information on Acentria check out:

Elisabeth M. Gross, Robert L. Johnson and Nelson G. Hairston Jr. 2000. Experimental evidence for changes in submersed macrophyte species composition caused by the herbivore Acentria ephemerella (Lepidoptera). Oecologia.DOI 10.1007/s004420000568. Article in HTML  Published online: 16 December 2000

Johnson RL, Gross EM, Hairston NG Jr . 1998. Decline of the invasive submersed macrophyte Myriophyllum spicatum (Haloragaceae) associated with herbivory by larvae of Acentria ephemerella (Lepidoptera). Aquat Ecol 31:273-282.

Johnson, R.L., P.J. Van Dusen, J.A. Toner and N.G. Hairston, Jr. 1999 [In Press]. Eurasian
Watermilfoil Biomass Associated with Insect Herbivores in New York. Journal of Aquatic Plant Management. 39: 283-289.

All images are the property of Robert L. Johnson, and cannot be dupicated without prior written permission. All rights reserved. Copyright 2001.