Abstract
The semi-looper Autographa nigrisigna (Walker) is a polyphagous pest in Plusiinae (Lepidoptera: Noctuidae). However, the egg and larval morphologies have not been studied in detail to date. Here the eggs and larvae of A. nigrisigna were investigated using light and scanning electron microscopy. The egg is domed and is of an upright type, with two or three micropyles at the top and vertical ribs on the chorion. The micropyles are surrounded by a rosette-like pattern of radiating ribs. The eruciform larva possesses three pairs of thoracic legs and three pairs of abdominal prolegs each on A5, A6, and A10, the most remarkable larval character of Plusiinae. The crochets are uniordinal in a mesal penellipse. In chaetotaxy, SV2 is present on abdominal segments I–IV and X, but is absent on other segments. The roles of egg and larval characters in taxonomic and phylogenetic analyses are briefly discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
