Nutritional fitness of a reduviid predator Rhynocoris marginatus (fab.) (Hemiptera: Reduviidae) using biological traits
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ORIGINAL RESEARCH ARTICLE
Nutritional fitness of a reduviid predator Rhynocoris marginatus (fab.) (Hemiptera: Reduviidae) using biological traits and macromolecules of pests Kitherian Sahayaraj 1
&
Priya Dharshini Lakshmanan 1
&
Yêyinou Laura Estelle Loko 2
Received: 14 April 2020 / Accepted: 11 September 2020 # African Association of Insect Scientists 2020, corrected publication 2020
Abstract Rhynocoris marginatus (Fab.) is one of the most predominant biological control agents in India, which feeds on wide range of economically important pestiferous insects. The nutritional fitness of the reduviid predator was assessed with five orthoperan crop pests such as (Diabolocatantops pinguis (Stål), Oxya nitidula (Walker), Atractomorpha crenulata (Fab.), Orthacris maindroni (Bolivar), and Trilophidia annulata (Thunberg) and a laboratory host Corcyra cephalonica (Stainton) under laboratory conditions. Results reveals that all prey species, supports the completion of life cycle (nymphal developmental time, preoviposition, oviposition and post-oviposition periods, adult longevity, fecundity) of this predator. Moreover, the macromolecular components (total carbohydrate, protein and lipid) and the enzymatic profile (amylase, invertase, protease and lipase) of chosen preys (Phenacoccus solenopsis (Tinsley), C. cephalonica, Dysdercus koenigii (Fab.), Spodoptera litura (Fab.), D. pinguis, O. nitidula, A. crenulata, O. maindroni and T. annulata) and, predators reared with the five orthopteran prey species were also estimated. The macromolecular, enzymatic and biological studies shows that D. pinguis is the suitable prey for R. marginatus. Keywords Reduviid predator . Pestiferous insects . Life cycle . Macromolecular and enzyme profile
Introduction Rhynocoris marginatus (Fab.) is a polyphagous predator present in most agro-ecosystems and their bordering ecosystems like scrub jungles, semi-arid zones and forests in India. It was reported to be a suitable predator of more than 25 insect pests, including Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae), Dysdercus koenigii (Fab.) (Hemiptera: Pyrrhocoridae), Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae), Spodoptera litura (Fab.) (Lepidoptera: Noctuidae) (Imms 1965; Nayar et al. 1976; Pawar et al. 1986; Ambrose 1999; Sahayaraj and * Kitherian Sahayaraj [email protected] 1
Crop Protection Research Centre, Department of Zoology, St. Xavier’s College, Palayamkottai, Tirunelveli, Tamil Nadu 627002, India
2
Laboratory of Applied entomology (LEnA), National High School of Applied Biosciences and Biotechnologies (ENSBBA), National University of Sciences, Technologies, Engineering and Mathematics, BP 14 Dassa, Benin
Paulraj 2001; Sahayaraj and Raju 2004; Sahayaraj 2007). It primarily feeds on young ones of Lepidopteran, Hemipteran, Orthopteran, Coleopteran and Isopteran insects although it accepts prey from other insects order (Kumaraswami 1991; Sahayaraj 1995). It has a good searching ability, moderate degree of host specificity, shorter developmental period and
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