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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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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.2018.7(6): 348-362
DOI: https://doi.org/10.20546/ijcmas.2018.706.039


Growth, Yield and Economics of Transplanted Rice (Oryza sativa L.) as Influenced by Different Weed Management Practices
Jaladhar Gorain1, Koushik Patra2 and Parthendu Poddar2
1Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal-741252, India
2Department of Agronomy, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal-736165, India
*Corresponding author
Abstract:

Among the food crops, rice is the mainstay of the sustenance of Asia’s population since long. Therefore, smart rice research is needed to make the rice production systems economically and ecologically sustainable. Weeds are known to be a major biotic constraint in agricultural production systems. Of the total annual loss of agricultural produce from various pests in India, weeds accounts for 45%, insect 30%, diseases 20% and other pests 5% (Rao, 1983). In India, yield loss due to weeds in transplanted rice was estimated to the tune of 30.9 % over weedy check (AICRP-weed management, 2003-2012). Considering the diversity and complexity of weed problem, it can be stated that no single method of weed control whether cultural, manual, mechanical or chemical would be sufficient to provide season-long sustainable weed management under transplanted rice ecosystem. In the above-mentioned perspective, a field experiment on weed management in ‘Mashuri’ cultivar of rice was carried out at Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal during kharif season of 2016. The experiment was laid out in randomized block design having 12 treatments replicated thrice: T1 – Weedy check; T2 – Weed free; T3 – PW at 15, 30 and 45 DAT; T4 – Metsulfuron methyl 20% WP @ 8 g a.i. ha-1 at 10 DAT; T5 – Bispyribac sodium 10% SC @ 20 g a.i. ha-1 at 14 DAT; T6 – Bispyribac sodium 10% SC @ 30 g a.i. ha-1 at 14 DAT; T7 – Pretilachlor 0.60 kg a.i. ha-1 + PW at 25 and 40 DAT; T8 – Pretilachlor 0.60 kg a.i. ha-1 + 2,4-D 0.50 kg a.i. ha-1 at 30 DAT + PW at 45 DAT; T9 – Pretilachlor 0.60 kg a.i. ha-1 + Bispyribac sodium 10% SC @ 20 g a.i. ha-1 at 22-25 DAT + PW at 40 DAT; T10 – Bispyribac sodium 10% SC @ 20 g a.i. ha-1 at 20 DAT + PW at 40 DAT; T11 – 2,4-D 0.50 kg a.i. ha-1 at 25 DAT + PW at 40 DAT and T12 – Pretilachlor 0.60 kg a.i. ha-1 + Metsulfuron methyl 20% WP @ 8 g a.i. ha-1 at 10 DAT. It was evident from the results that almost all the growth and yield attributes, weed population (no m-2), dry weight of weeds (g m-2), WCE, WCI and WI differed significantly with different weed management practices. So far as growth components and yield attributes were concerned, T2 i.e. weed free exhibited the best performance closely followed and in some cases being at par with T9. Highest grain yield (4.23 t ha-1) was achieved from weed free being at par with T9 (4.14 t ha-1) but differed significantly from others. Apart from weed free treatment, highest WCE & WCI was achieved from T9. Excepting T2 lowest weed index at harvest (1.72 %) was also achieved from T9. As far as the production economics was concerned, highest gross return (Rs. 68541.00/ha) was obtained from T2 followed by T9 (Rs. 67198.00/ha). But in case of net return, highest value of Rs. 29223.00 was obtained from T9 and due to its high cost of cultivation T6 showed highest input: output ratio (1:1.80) narrowly followed by T9 (1:1.77). So, it was concluded that the treatment T6 or T9 could be opted for sufficient control of weeds in transplanted kharif paddy in terai zone of West Bengal to maximize the economic return.


Keywords: Transplanted rice, Herbicides, Paddy weeder (PW), Weed control efficiency (WCE), Weed Control Index (WCI), Weed Index (WI) and yield components
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How to cite this article:

Jaladhar Gorain, Koushik Patra and Parthendu Poddar. 2018. Growth, Yield and Economics of Transplanted Rice (Oryza sativa L.) as Influenced by Different Weed Management Practices.Int.J.Curr.Microbiol.App.Sci. 7(6): 348-362. doi: https://doi.org/10.20546/ijcmas.2018.706.039