Follow
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 2016 - IJCMAS--ICV 2016: 92.3 For more details click here
National Academy of Agricultural Sciences (NAAS) : NAAS Score: *5.38 (2017) [Effective from January 1, 2017]For more details click here
Indexed in



National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2017)
[Effective from January 1, 2017]
For more details click here

ICV 2016: 92.3
Index Copernicus ICI Journals Master List 2016 - IJCMAS--ICV 2016: 92.3
For more details click here
journals IJCMAS
See Guidelines to Authors
Current Issues

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 2015: 85.95
NAAS RATING 2017: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(3): 2376-2388
DOI: https://doi.org/10.20546/ijcmas.2017.603.272


Weed dynamics under changing climate scenario: A Review
Dinesh Jinger1, Ramanjit Kaur1*, Navneet Kaur2, G.A. Rajanna1, Kavita Kumari1 and Anchal Dass1
1Division of Agronomy, ICAR-Indian Agricultural Research Institute, New Delhi- 110012, India
2Department of Agroforestry, Punjab Agricultural University, Ludhiana, Punjab, India
*Corresponding author
Abstract:

Weeds are ubiquitous in nature and invade both crop and non-crop lands. When present in crop fields, weeds compete with the crops for nutrients, soil moisture, solar radiation and space; hence reduce their productivity and quality. But, they have been the most underrated crop pests despite the fact that these are weeds which cause heavy loss in crop yield rather than other pests. It has been reported that, out of total loss of agriculture production from several pests in India, weed account for about 37%, insect for 29%, diseases for 22% and other pests for 12%. Under changing climate scenario, the levels of weed menace and consequent crop-weed competition are expected to change. Weeds have been conquers and will remain dominant in climate change conditions also since, they have vast adaptive capacity and greater diversity. Climate change may aggravate the weed density, their phenology and invasiveness. Elevated CO2, rising temperature, changing in rainfall pattern are the distinct consequences of climate change, which leads to deleterious changes in the crop-weed competition, photosynthetic pathway and ultimately growth, density and expansion of weeds. Under climate change scenario, plants with C4 photosynthetic pathways are expected to benefit more than C3 from rising temperature but inverse is true with CO2 enrichment. This differential response of C3 and C4 plants to elevated CO2 and temperature can have important implications on crop-weed competition as most of the weeds are C4 and most of the crops are C3 plants.


Keywords: Climate change,Crop-weed competition,Elevated CO2, Elevated temperature, Weed growth.
Download this article as Download

How to cite this article:

Dinesh Jinger, Ramanjit Kaur, Navneet Kaur and Anchal Dass. 2017. Weed Dynamics under Changing Climatic Scenario: A Review.Int.J.Curr.Microbiol.App.Sci. 6(3): 2376-2388. doi: https://doi.org/10.20546/ijcmas.2017.603.272