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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 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
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 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(1): 676-689
DOI: https://doi.org/10.20546/ijcmas.2020.901.073


Effect of Weed Management on Weed Interference, Nutrient Depletion by Weeds and Production Potential of Long Duration Pigeonpea (Cajanus cajan L.) under Irrigated Ecosystem
Amitesh Kumar Singh1, R.S. Singh2, Amit Kumar Singh3, Rakesh Kumar4,Narendra Kumawat5*, Nikhil Kumar Singh1, S.P. Singh1 and Ravi Shanker1
1GVT- Krishi Vigyan Kendra, Godda-814133, Jharkhand, India
2Department of Agronomy, IAS, Banaras Hindu university, Varanasi- 221 005, U.P., India
3Udai Pratap (Autonomous) College, Varanasi-221 007, U.P., India
4ICAR-Research Complex for Eastern Region, Patna-800 014, Bihar, India
5AICRP on SAS & USW, College of Agriculture, Indore-452 001, M.P., India
*Corresponding author
Abstract:

Timely weed management is important to increase productivity in s long­­-duration crop like pigeonpea. A field study to evaluate the effect of weed management on weed interference, nutrient depletion by weeds and production potential of long duration pigeonpea under irrigated ecosystem was conducted at Agricultural Research Farm, IAS, BHU, Varanasi during 2009-10 and 2010-11. Results revealed that use of imazethapyr @ 0.15 kg ha-1 followed by (fb) paraquat @ 0.4 kg ha-1 40 days after sowing (DAS) significantly (P ≤ 0.05) reduced the weed density, total weed density and total weed dry weight being statistically at par with two hand weeding (HWs) at 25 and 50 days after sowing (DAS). Weed control index, weed persistence index and weed index were the highest in weed- free, 2- HWs and imazethapyr applied @ 0.15 kg ha-1 fb paraquat 0.4 kg ha-1. However, weed-free treatment resulted in per cent higher yield attributes like pods plant-1 (32.0 and 29.5%), grains pod-1 (34 and 32.6%), 1000-grain weight (25.8 and 21.5%), grain yield (48.7 and 47.5%), gross returns (46.0 and 45.0%), net returns (54.6 and 53.0%) and benefit-cost ratio (40.7 and 38.5%), being significantly higher than weedy check but remained at par with 2-HWs, imazethapyr @ 0.15 kg ha-1 fb paraquat @ 0.4 kg ha-1. The highest nutrient depletion by weeds was recorded in weedy check, whereas, the lowest was in imazethapyr @ 0.15 kg ha-1 fb paraquat 0.4 kg ha-1.


Keywords: Hand weeding, Herbicides, Pigeonpea, Seed yield, Weed control index, Weed flora
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How to cite this article:

Amitesh Kumar Singh, R.S. Singh, Amit Kumar Singh, Rakesh Kumar, Narendra Kumawat, Nikhil Kumar Singh, S.P. Singh and Ravi Shanker. 2020. Effect of Weed Management on Weed Interference, Nutrient Depletion by Weeds and Production Potential of Long Duration Pigeonpea (Cajanus cajan L.) under Irrigated Ecosystem.Int.J.Curr.Microbiol.App.Sci. 9(1): 676-689. doi: https://doi.org/10.20546/ijcmas.2020.901.073