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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(8): 3117-3124
DOI: https://doi.org/10.20546/ijcmas.2020.908.354


Evaluation of Green Insecticides against Gram Podborer, Helicoverpa armigera (Hubner) in Pigeonpea (Cajanus cajan L.)
Thilagam*, D. Dinakaran and A. Gopikrishnan
Tamil Nadu Agricultural University, Agricultural Research Station,
Virinjipuram, Vellore, Tamil Nadu, India
*Corresponding author
Abstract:

Two field experiments were conducted during Kharif, 2018 and 2019 to evaluate the efficacy of green insecticides against gram podborer, Helicoverpa armigera (Hubner) in pigeonpea in comparison with the sequential application of chemical insecticides. Among the green insecticides tested, Bacillus thuringiensis var.kurstaki @ 1 g/ litre was found to be effective in minimizing the larval population of H. armigera in both the seasons tested. The reduction in larval population resulted in the lowest mean per cent pod damage (23.67) with 47.90 per cent reduction and recorded the highest grain yield of 910.8 kg per ha with a yield increase of 39.1 per cent over untreated check. However, when compared with the sequential application of insecticides viz., Chlorantraniliprole 18.5 SC 30 g a.i per ha followed by Flubendiamide 480 SC @ 30 g a.i per ha and Deltamethrin 2.8 EC@ 12.5 g a.i per ha the efficacy proved to be second effective treatment which recorded the lowest larval population lead to the lowest mean pod damage per cent with increased grain yield of 1145.7 kg per ha.


Keywords: Green insecticides, Pigeonpea, Gram podborer, Helicoverpa armigera, Pod damage
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How to cite this article:

Thilagam, P., D. Dinakaran and Gopikrishnan, A. 2020. Evaluation of Green Insecticides against Gram Podborer, Helicoverpa armigera (Hubner) in Pigeonpea (Cajanus cajan L.).Int.J.Curr.Microbiol.App.Sci. 9(8): 3117-3124. doi: https://doi.org/10.20546/ijcmas.2020.908.354