Giant salvinia with yellowing leaves due to the damage by the salvinia weevil larvae.
Freshwater marsh in coastal Louisiana. Those beautiful ochre patches are giant salvinia dying because of the feeding damage of the salvina weevil.
Phragmites australis die-back in Plaquemines Parish. Dead stems are the only remanents of the previous year's growth.
Bugs, weeds and other organisms
Female scales attached to roseau cane stem, note parasitoid pupae inside. Picture by Dr. Blake Wilson.
Salvinia weevil (Cyrtobagous salviniae). Pic. by Dr. Kat Parys.