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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(8): 4076-4081
DOI: https://doi.org/10.20546/ijcmas.2018.708.423


Effect of Site Specific Nutrient Management for Targeted Yields on Population Dynamics of Sucking Pests in Bt-Cotton (Gossypium hirsutum L.)
Vinayak Hosamani1*, B.M. Chittapur2, Mallikarjun3, A.S. Halepyati4, Satyanarayana Rao5, M.B. Patil6, N.L. Rajesh7 and Venkatesh Hosamani8
1P2 BSF, Nagenahally, Kunigal, Central Silk Board, Bangalore/ UAS, Raichur, Karnataka, India
2Directorate of Extension
3e-SAP, Project, University of Agricultural Sciences,
Raichur, Karnataka, India
4University of Agricultural Sciences, Raichur, Karnataka, India
5Research Institute on Organic Farming, MARS. UAS, Raichur, Karnataka, India
6AEEC, Koppal, UAS, Raichur, Karnataka, India
7(SS&AC), COA, UAS, Raichur, Karnataka, India
8Entomology, COH, Munirabad-Koppal, Karnataka, India
*Corresponding author
Abstract:

The field experiment on cotton productivity and leaf reddening as influenced by nutrition management for targeted yield was conducted during growing seasons of 2014-15 and 2015-16 at College of Agriculture Farm, Raichur, Karnataka on medium deep black soil under irrigation. Three yield targets (3, 4 and 5 t kapas yield ha-1) based site specific nutrient management (SSNM) along with four leaf reddening management (LRM) treatments (S1 - Vermicompost @ 2.5 t ha-1 in seed line, S2 - S1 + MgSO4 10 kg ha-1 in seed line, S3 - S1 + MgSO4 25 kg ha-1 in seed line, and S4 - MgSO4 25 kg ha-1 in seed line + foliar nutrition of 1% MgSO4 +19:19:19 + 1% KNO3 trice during flowering, boll development and boll bursting stages) besides recommended control were tested using RCBD. SSNM for 5 t ha-1 yield target and supplementary nutrition of MgSO4 both to soil and to foliage and foliar application of major nutrients (19:19:19 and KNO3) (S4) recorded significantly higher aphids count throughout (3.69, 5.42, 2.87 and 3.3), hopper count (10.7, 15.3, 17.5 and 13.1) and thrips count throughout (14.0, 17.8, 21.1 and 16.6 at 30, 45, 60 and 90 DAS, respectively on pooled basis). The dynamics population was lower with medium to lower yield targets; latter (M1) had lower count among all on pooled basis.


Keywords: Bt cotton, SSNM and RDF, Cotton, Leaf hopper, Thrips, Aphids, Population dyanamics and Sucking pest
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How to cite this article:

Vinayak Hosamani, B.M. Chittapur, Mallikarjun, A.S. Halepyati, Satyanarayana Rao, M.B. Patil, N.L. Rajesh and Venkatesh Hosamani. 2018. Effect of Site Specific Nutrient Management for Targeted Yields on Population Dynamics of Sucking Pests in Bt-Cotton (Gossypium hirsutum L.).Int.J.Curr.Microbiol.App.Sci. 7(8): 4076-4081. doi: https://doi.org/10.20546/ijcmas.2018.708.423