Foldscope coupled with smartphone view on antennal and wing morphometrics of the stored-product beetle pests

In the present study, we have observed antennal and wing morphometrics of the six stored-product beetle pests with the aid of foldscope microscope. As a result, antennal observations revealed different types of antennae in beetle species viz., serrate in Callosobruchus maculatus and Lasioderma serricorne, capitate in Rhyzopertha dominica and Tribolium castaneum, moniliform in Oryzaephilus surinamensis and geniculate in Sitophilus oryzae. Further, plain-circular with distinct outer and inner layers, blob-circular with a sharp tip, blob-circular with blend tip, blob-rectangular and blob-square patterns of chain line markings were observed in C. maculatus, S. oryzae, O. surinamensis, R. dominica and T. castaneum, respectively and there was no specific markings observed in L. serricorne. The study findings suggests that species-specific antennal and forewings patterns may helpful in rapid identification of beetle pest species using portable foldscope microscope at grain storage depots.