Browsing by Author "Ashwani Kumar Patel"

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An Overview of Predacious Fungi for the Management of Root-Knot Disease in Vegetables
(Springer Nature, 2023) Vandana Sahu; Ashwani Kumar Patel; Shiv Shankar Patel
Plant parasitic nematodes (PPN) are ubiquitous in agricultural soils. They damage a range of vegetables as well as other agricultural crops worldwide. Some predaceous fungi, which act as nematode’s natural enemies, are one of the best pest management remedies. Some of these microbes create traps, resulting in the eelworms getting trapped and killed. Other predacious fungi behave as parasites inside the nematodes, producing poisons and virulence components that kill the nematodes internally. In order to develop powerful biological control agents against nematodes, it is crucial to understand the underlying principles of microbe-nematode interactions. In addition to focusing on the methods by which predaceous fungi infect worms and the nematode defence against dangerous infections, this book chapter reviews recent developments in our understanding of the interactions between nematodes and predaceous fungi. This chapter comprises important topics for more research and development, including prospective plans for applying our most recent findings to create efficient biocontrol methods for managing root-knot diseases of vegetables. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.
Important Plant Parasitic Nematodes (PPNs) of Major Cereals in India and Their Management
(CRC Press, 2025) Shyam Saran Vaish; Shiv Shankar Patel; Vandana Sahu; Ashwani Kumar Patel; Vinod B. Upadhyay
Cereals play an important role in meeting the objective of national food security. Among the different cereals, rice and wheat are considered major crops in India. These widely grown crops are affected by various abiotic and biotic stresses. Among the biotic stresses, plant parasitic nematodes (PPNs) cause significant losses and affect their production. Among the PPNs, root knot nematodes (Meloidogyne graminicola L.), Cereal cyst nematode (Heterodera spp.), Seed gall nematode of wheat (Anguina tritici L.), Lance nematode (Hoplolaimus galeatus L.), root lesion nematode (Pratylenchus spp.), Tundu or yellow year rot (Rathaybacter tritici + Anguina tritici), rice root nematode (Hirschmanniella spp.) pose major threat to the cereal production. These nematodes do not produce distinguishable symptoms as produced by other plant pathogens. Yellowing, stunting and wilting eventually leading to plant death are the most common characteristic symptoms that may mislead. Therefore, the suspected plants should be uprooted for the presence of galls, lesions, cysts and nature of root growth, and the rhizosphere soil should also be processed for the presence of predominant plant parasitic nematodes. The objective of management of plant parasitic nematodes can be fulfilled by increasing the number of predators, parasites and pathogens in the soil by cultural practices and or by their introduction into the soil as biological control agents. An integrated approach is of paramount importance for achieving the ultimate goal of sustainable agriculture. Hence, the present topic appears to be very useful for the policy makers, plant protection personnel and students. © 2026 selection and editorial matter, Dinesh Singh, Rashid Pervez, and Anoop Kumar; individual chapters, the contributors.
Oil Cakes Stimulate Native Population of Catenaria anguillulae that Suppresses Root-Knot Disease of Cowpea
(Nematological Society of India, 2025) P. V. Phanindra; Adhikari Mounika; Vandana Sahu; Ashwani Kumar Patel; Shyam Saran Vaish
In the present investigation, oil cakes of linseed (Linum usitatissimum), mustard (Brassica juncea) and groundnut (Arachis hypogaea) were applied in a Meloidogyne incognita infested soil at a rate of 0.5% to examine their impact on the population dynamics of Catenaria anguillulae and its subsequent role in suppressing the root-knot in cowpea (Vigna unguiculata). The assessment of the population dynamics of the fungus following the application of the oil cakes at eight-day interval revealed the maximum stimulation (6.6 folds) in the native population of C. anguillulae 24 days after amendment of groundnut oil cake followed by linseed and mustard oil cakes. The stimulated native population of the fungus resulted in a significant reduction in the soil population of M. incognita juveniles (J2 s), and gall-index and getting the widest nematode-to-root biomass ratio (1:531) compared to the control (1:160, narrowest ratio). The population of other plant parasitic nematodes (PPNs) was also suppressed following the oil cake amendment. The suppressed population of M. incognita and other PPNs significantly improved the plant growth irrespective of the cakes. This is the first observation on establishing a relationship between the stimulated population of C. anguillulae and the suppression in the population of PPNs. © 2025, Nematological Society of India. All rights reserved.