Morphological studies on mouthparts of larval instars in Deudorix isocrates (Fab.) (Lepidoptera: Lycaenidae)

Abstract :

Deudorix isocrates (Fab.) is one of the serious pests of pomegranate. The morphology of mouthparts and presence of various sensilla were found significant to understand pest activity and taxonomic features. The larva has of biting and cutting mouthparts. The labrum, mandibles and maxillolabial-hypopharyngeal complex exhibit various types of sensilla which have significant role in olfaction and gustatory sense. The present investigation revealed presence of sensory setae and sensilla basiconica on the labrum. The mandibles are cutting type which shows curved and sharp incisor teeth. Four sensory setae are observed on outer surface of mandible. The maxillolabial-hypopharyngeal complex is morphologically general lepidopterous type with some specific characteristics. The labial and maxillary components have various sensilla. The labium bears paired sensillar pegs on anterior margin of premental sclerite and two sensilla on each labial palp. The maxillary palp has eight sensilla basiconica on distal tip and a sensilla placodeum on the lateral wall. The galea on its distal surface exhibits three sensilla trichodea, two sensilla styloconica, which are termed as lateral sensilla styloconica, and medial sensilla styloconica and three sensilla basiconica. Besides sensilla from dorsal surface there is a companiform sensilla located midventrally on the anterior wall of galea.

Keyword :

Lepidoptera, D. isocrates, pest, mouthparts, sensilla

Author(s) : Patil, R. D., Dethe, V. D.
Downloads : 31
Published Issue : 2022 Vol. 17 Number 1

2022 Vol. 17 Number 1