Amaranthus
Guides
Conotrachelus seniculus
amaranth weevil, pigweed curculio
Conotrachelus seniculus, commonly known as the amaranth weevil or pigweed curculio, is a species of true weevil in the family Curculionidae. It is native to North America, with confirmed records in Ontario and Québec, Canada. The species is taxonomically accepted and has been documented in multiple databases. Information on its biology and ecology remains limited compared to its congener Conotrachelus nenuphar, a well-studied agricultural pest.
Spodoptera albula
Gray-streaked Armyworm Moth, Unbarred Spodoptera Moth, Gray-streaked Armyworm
Spodoptera albula is a noctuid moth distributed from the southern United States through South America. The adult has a wingspan of 33–35 mm. Larvae are polyphagous but show a preference for Amaranthus species, and have been documented as a minor pest of soybean in Brazil. The species is one of several Spodoptera armyworms affecting agricultural crops in the Americas, though it remains less economically significant than congeners such as S. eridania or S. cosmioides.