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N. V. Radhakrishnan

Publications (12)

Epidemiology and Virulence Profiling of Colletotrichum spp. Causing Turmeric Leaf Spot in Kerala, India

Govindh A. Nair, N. V. Radhakrishnan, Susha S. Thara, Heera G. & Sreekala G.S. · Journal of Advances in Biology & Biotechnology · 2025

Turmeric, Curcuma longa L., is an economically important spice crop that is increasingly threatened by leaf spot disease caused by species of Colletotrichum genus. An epidemiological survey was conducted across major turmeric-growing regions in Kerala, India, covering the distric...

Open access Research Article 10.9734/jabb/2025/v28i123398

Incidence of Bhendi Yellow Vein Mosaic Disease and Isolation of Potential Endophytic Bacterial Antagonists from Okra (Abelmoschus esculentus L.)

B. S. Sandeep, M. K. Dhanya, N. V. Radhakrishnan, K. N. Anith, A. Sajeena & Juel Debnath · Journal of Advances in Biology & Biotechnology · 2026

The present study aims to investigate the prevalence and occurrence of bhendi yellow vein mosaic disease in okra and to explore the potential bacterial endophytes. A survey was conducted in the major okra-growing areas of Thiruvananthapuram and Kottayam districts in Kerala during...

Open access Research Article 10.9734/jabb/2026/v29i33737

Synthesis and Characterization of Chitosan Nanoparticles Derived from Fungal and Crustacean Sources

Juel Debnath, M. M. Safeer, N. V. Radhakrishnan, Susha S. Thara, P. R. Nithya & B. S. Sandeep · Journal of Advances in Biology & Biotechnology · 2026

Chitosan, a deacetylated biopolymer derived from chitin, is widely valued for its biocompatibility, biodegradability, and applications in medical, agricultural, and environmental systems. Conventional production from crustacean shells poses challenges such as allergenic proteins...

Open access Research Article 10.9734/jabb/2026/v29i33729

Natural Defense: The Inhibitory Effects of Endophytic Bacillus and Xylaria sp. against Rice Pathogens

Sushitha, A. Sajeena, N. V. Radhakrishnan, Joy Michal Johnson, Swapna Alex & R. Beena · International Journal of Plant & Soil Science · 2024

Aim: Endophytes living inside the plant tissues are known to play a crucial role in the physiology and developmental functioning of host plants. Rice is the major food crop that feeds half of the world population. But pest and diseases lead to drastic yield reduction in rice. Sus...

Open access Research Article 10.9734/ijpss/2024/v36i105068

Molecular Mechanisms and Cytopathology of Phytophthora: Strategies, Interactions and Future Perspectives

Aswathi M. S, Lellapalli Rithesh & N. V. Radhakrishnan · Journal of Advances in Biology & Biotechnology · 2024

Phytophthora is an aggressive plant pathogen, pose substantial threats to global agriculture, leading to extensive crop losses. Controlling Phytophthora diseases remains challenging, with limited effective methods available. Host resistance emerges as a promising strategy, but it...

Open access Research Article 10.9734/jabb/2024/v27i5849

Distribution and Relationship of Brown Spot Disease of Rice Caused by Bipolaris oryzae with Weather Parameters Across Kerala, India

G. L. Akhil, Susha S. Thara, S. R. Reshma & N. V. Radhakrishnan · Journal of Advances in Biology & Biotechnology · 2026

Brown spot, caused by Bipolaris oryzae, is one of the most prevalent diseases of rice and can assume epiphytotic proportions. A survey was conducted during August–October 2024 to determine the distribution, incidence, severity and epidemiological factors associated with brown spo...

Open access Research Article 10.9734/jabb/2026/v29i104472

Defence Responses in Rice against Bipolaris oryzae, the Causal Agent of Brown Spot Disease: A Comprehensive Review

G. L. Akhil, Susha S. Thara, A. U. Akash & N. V. Radhakrishnan · Journal of Advances in Biology & Biotechnology · 2026

Brown spot disease caused by Bipolaris oryzae remains a persistent threat to global rice production, with potential yield losses of up to 90%. This review consolidates current knowledge on the pathogen’s biology, epidemiology and host-pathogen interactions, with particular emphas...

Open access Research Article 10.9734/jabb/2026/v29i33753

Occurrence and Characterization of Fusarium Wilt of Salad Cucumber in Southern Kerala, India

Naurin Hisana B., R. Pramod, Susha S.Thara, N. V. Radhakrishnan & K. N. Anith · Journal of Advances in Biology & Biotechnology · 2025

The present study investigated the occurrence, symptomatology, pathogenicity and characterization of the fungal pathogen associated with wilt of salad cucumber in selected agro-ecological units (AEU 8 and AEU 9) of Kerala. Survey conducted in Thiruvananthapuram, Kollam and Pathan...

Open access Research Article 10.9734/jabb/2025/v28i123380

Spatial Distribution, Cultural Diversity and Virulence of Colletotrichum spp. Causing Chilli Anthracnose in Kerala, India

Amrith Raj, G. Heera, M. Joy, R. Ayisha, Thomas George & N. V. Radhakrishnan · Journal of Advances in Biology & Biotechnology · 2026

Chilli anthracnose (fruit rot), caused by Colletotrichum spp., is one of the most destructive diseases limiting chilli production, resulting in substantial pre- and post-harvest losses. This study assessed the distribution, symptom expression, cultural characteristics, mycelial g...

Open access Research Article 10.9734/jabb/2026/v29i104460

Weather-Driven Dynamics of Rice Blast Disease in Kerala’s Lowland Rice Ecosystem

Aryasree Vidyadharan, M. Surendran, Susha S. Thara, Sindura K. P., P. K. Amrith & N. V. Radhakrishnan · Journal of Advances in Biology & Biotechnology · 2025

Rice blast, caused by Pyricularia oryzae, continues to be one of the most devastating diseases of rice and poses a significant threat to crop productivity in the Kuttanad lowland ecosystem of Kerala. To understand the spatial pattern of disease occurrence and its association with...

Open access Research Article 10.9734/jabb/2025/v28i123392

Suppression of Tomato Leaf Curl Virus in Tomato with Enhanced Growth, Yield and Fruit Quality by Phyllanthus niruri and Boerhavia diffusa under Field Conditions

Saru Sara Sam, Joy Michal Johnson, Deepa R. Chandran, A. Mary Sharmila, T. Anuradha, N. S. Radhika, S. Sarada, R. Beena & N. V. Radhakrishnan · International Journal of Plant & Soil Science · 2026

Aims: To evaluate promising antiviral botanicals such as Phyllanthus niruri and Boerhavia diffusa at low concentrations for managing tomato leaf curl disease (ToLCD) in tomato plants under pot culture and field conditions. Study Design: Sequential pot culture and field experiment...

Open access Research Article 10.9734/ijpss/2026/v38i106359

Piriformospora indica Preserves Fruit Quality and Postharvest Shelf Life While Suppressing Tomato Leaf Curl Virus

Saru Sara Sam, Joy Michal Johnson, A. Mary Sharmila, Deepa R. Chandran, T. Anuradha, N. S. Radhika, S. Sarada, R. Beena & N. V. Radhakrishnan · Journal of Advances in Biology & Biotechnology · 2026

Tomato leaf curl virus (ToLCV) is one of the most destructive viral pathogens, limiting tomato productivity by impairing plant growth, fruit development, yield, and nutritional quality. Piriformospora indica is a beneficial root endophytic fungus known to enhance plant growth, yi...

Open access Research Article 10.9734/jabb/2026/v29i84194