Incidence of Stored Grain Coleopteran Infestation in Domestically Stored Split Red Lentil (Lens culinaris): A Field Observation and Short Communication
Ankita Awasthi *
Department of Zoology, Acharya Narendra Dev Nagar Nigam Mahila Mahavidyalaya, Kanpur, Uttar Pradesh, India.
*Author to whom correspondence should be addressed.
Abstract
Stored pulses are vulnerable to insect infestation during household and small-scale storage, with consequent quantitative and qualitative losses. This short communication documents a household-level coleopteran infestation in split red lentil (Lens culinaris) stored in a sealed glass jar in Kanpur, Uttar Pradesh, during September 2026. Visual examination and photographic documentation showed localised patches of fine greyish-beige frass within the grain mass and numerous small, free-moving beetles on the inner jar surface above the grain. Close-range images indicated small, oval to broadly elliptical, convex-bodied adults approximately 2–3 mm long, with reddish-brown to dark brown colouration, filiform antennae, and well-developed legs. The observed combination of diffuse feeding or boring dust and adult morphology was compared with features of common stored-pulse beetles, particularly Callosobruchus spp. and Tribolium castaneum. Because the lentil was split and dehusked, the damage pattern was considered more compatible with external or secondary feeding than with concealed larval development alone, although bruchid involvement could not be excluded. Species-level identification was not attempted because microscopic examination, taxonomic keying, and genitalic assessment were not performed. The observation illustrates the practical value of routine inspection, segregation of infested stock, drying, sieving, and airtight re-storage, while emphasising that photographic evidence supports only provisional taxonomic assessment. Laboratory examination of representative specimens is required for definitive identification.
Keywords: Stored-product pests, pulse beetle, Callosobruchus, Tribolium castaneum, post-harvest loss, Lens culinaris, Kanpur