Perumal Vivekanandhan

Chiang Mai University, Entomology and Plant Pathology, Faculty Member

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I am Dr. P. Vivekanandhan, a Senior Research Scientist at Chiang Mai University, Thailand. Throughout my research career, I have had a keen interest in botanical-derived insecticides and entomopathogenic fungi-based microbial insecticides. I have also focused on developing various formulations and investigating biological insecticides. I am particularly intrigued by observing the mode of action of entomopathogenic fungi and plant-derived molecules, as well as conducting epidemiological studies.
Supervisors: Patcharin Krutmuang
Phone: +66 942303434
Address: Dr. P. Vivekanandhan, M.Sc., Ph.D., (Editor-in-Chief: Entomology and Applied Science Letters; Section Editor: Scientific Report, Plos One; Frontiers Microbiology; Frontiers in Tropical Disease; Forest-MDPI).
Senior Research Scientist
Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand.
Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand.
Mobile: +91-9976585612

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Papers by Perumal Vivekanandhan

Novel report on soil infection with Metarhizium rileyi against soil‐dwelling life stages of insect pests

Journal of basic microbiology, May 21, 2024

Toxicity, biochemical and molecular docking studies of Acacia nilotica L., essential oils against insect pests

Toxicon, Apr 1, 2024

Biological control effect of Trichoderma harzianum (Hypocreales: Hypocreaceae) against phytopathogens

Environmental quality management, Apr 2, 2024

Pathogenicity of Metarhizium rileyi (Hypocreales: Clavicipitaceae) against Tenebrio molitor (Coleoptera: Tenebrionidae)

Journal of basic microbiology, Mar 11, 2024

A review of entomopathogenic fungi as a potential tool for mosquito vector control: A cost‐effective and environmentally friendly approach

Entomological research, Mar 1, 2024

Biocontrol efficacy of entomopathogenic fungi Beauveria bassiana conidia against agricultural insect pests

Environmental Quality Management, Jan 8, 2024

Entomopathogenic fungi based microbial insecticides and their physiological and biochemical effects on Spodoptera frugiperda (J.E. Smith)

Frontiers in Cellular and Infection Microbiology, Dec 10, 2023

Background: 'The fall armyworm, Spodoptera frugiperda', represents a significant threat to maize ... more Background: 'The fall armyworm, Spodoptera frugiperda', represents a significant threat to maize production, a major staple crop in Asian countries. Methods: In pursuit of more effective control of this insect pest, our study assessed the physiological and biochemical effects of the entomopathogenic fungus Metarhizium anisopliae against the larvae of S. frugiperda. Results: Results revealed that, following nine days of treatment, a high concentration of conidia (1.5x10 7 conidia/mL -1 ) was toxic to all stages of larvae (second to fifth instar), resulting in 97% mortality of the second instar, 89% mortality of the third instar, 77% mortality of the fourth instar, and 72% mortality of fifth instar. All larval instars were found to have dose-dependent mortality effects. Treated S. frugiperda larvae further displayed significant physiological, morphological, and behavioral changes. Here, treated larvae displayed significantly lower levels of acetylcholinesterase, a-carboxylesterase, and b-carboxylesterase enzyme activity when compared to control groups. Treated larvae underwent an outward morphological change as the result of a decrease in the exterior cuticle of the anal papillae and a demelanization of the interior cuticle. Treated larvae also exhibited abnormal feeding behaviors as a consequence of the negative impact of conidia treatment on the neuromuscular system. Investigation into the effect of M. anisopliae on the non-target organism, the earthworm Eudrilus eugeniae, revealed that M. anisopliae conidia did not produce significant pathogenicity following three days of treatment. Furthermore, histological analysis revealed no significant effect of the entomopathogenic fungi on the gut tissue of the non-target organism. This study highlights the potential of M. anisopliae in the control of S. frugiperda.

Perumal Vivekanandhan

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