Dispersal-flight
Guides
Dysdercus bimaculatus
Two-spotted Cotton Stainer
Dysdercus bimaculatus, the two-spotted cotton stainer, is a true bug in the family Pyrrhocoridae. It is distributed across North, Central, and South America. Population build-up occurs during the dry season on seed crops from wild host-plants, with adults dispersing at season's end to locate better-quality seed resources. The species is considered a potential pest of cotton crops.
Sitona cylindricollis
sweetclover weevil
Sitona cylindricollis, the sweetclover weevil, is a broad-nosed weevil in the family Curculionidae. It is a documented agricultural pest of sweet clover (Melilotus officinalis) and alfalfa/lucerne (Medicago sativa). Adults feed on above-ground foliage, causing defoliation damage that is most severe during late summer critical periods. Larvae feed on root nodules and root tissue underground. The species exhibits temperature- and light-dependent dispersal flight behavior, with peak flight activity occurring in morning hours when ambient temperatures reach threshold levels.