CLIMATE CHANGE MEDIATED RESPONSE ON WEED, HERBICIDE AND THEIR
VULNERABILITIES, CONSEQUENCES AND FUTURE SCOPES
Abstract
Global climate change and its consequences such as rising temperatures,
hydrological cycle (variable rainfall), soil salinity due to inclusion
of sea water and rising carbon dioxide (CO2) levels, have an impact on
weed species, their population dynamics, growth, reproduction and
competitive ability and eventually crop productivity. Among these
environmental factors, rising CO2 levels will benefit C3 plants more
than C4 plants. Climate change can cause changes in the weed life cycle,
community composition. Over the course of the year, some weed species go
extinct while others develop into more noxious invaders and evolve
genetic artefacts in response to intensifying climatic and non-climatic
selection pressures. On the solution side, variations in temperature,
CO2 levels and rainfall alter stomatal conductance, cuticle viscosity,
transport, uptake, leaf retention duration and herbicide efficacy.
Therefore, to adapt and mitigate; it is important to review how climate
change can influence the crop-weed interaction.