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Efficacy of Entomopathogenic Nematodes against Diaphania indica (Saunders) (Lepidoptera:Crambidae) in Bittergourd

Indian Agricultural Research Journals

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Title Efficacy of Entomopathogenic Nematodes against Diaphania indica (Saunders) (Lepidoptera:Crambidae) in Bittergourd
 
Creator GAYATHRI , P.S.
M.S., NISHA
 
Subject Alginate gel, Diaphania indica, entomopathogenic nematode, formulation, pot culture
 
Description In vitro experiments were conducted to test the pathogenicity of entomopathogenic nematodes (EPNs) and virulence of infective juveniles (IJs) of effective strain stored in different formulations (sponge, talc and alginate gel) against cucumber moth, Diaphania indica (Saunders) in bitter gourd. Among EPN species tested, Heterorhabditis indica @ 100 IJs recorded the highest mortality (100%) of 3rd instar larvae of D. indica, followed by Steinernema carpocapsae (89.74%) at 48 hrs. H. indica was more virulent with a lower LD50 value (9.54) compared to S. carpocapsae (79.57) at 36 hrs of incubation. IJs of H. indica were stored in different formulations viz., alginate gel, talc, sponge, and water at 27+2°C for 11 weeks, and its pathogenicity was assessed against 3rd instar larvae of D. indica. H. indica IJs stored in talc and alginate formulations for seven weeks showed 68.96 and 75.86% mortality of D. indica larvae, respectively, at 72 hrs. Results of the pot culture study revealed that foliar application of alginate gel and talc-based formulations of H. indica increased mortality of D. indica (75.55 to 77.77%) and reduced leaf damage (41.6 to 51%) significantly in comparison with control and it was found equally effective to bioagent, Beauveria bassiana NBAIR Bb seven days after treatment.
 
Publisher Nematological Society of India
 
Date 2024-09-08
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJN/article/view/156050
 
Source Indian Journal of Nematology; Vol. 53 No. 1 (2023): Indian Journal of Nematology; 37-44
0974-4444
0303-6960
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJN/article/view/156050/55695
 
Rights Copyright (c) 2024 Indian Journal of Nematology
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