Does the tolerance of weeds to herbicide change with elevated levels of CO2?

The level of carbon dioxide (CO2) in the atmosphere has increased substantially over the past 100 years and is predicted to continue rising over the coming decades. Whilst this change has contributed significantly to the problem of global climate change, CO2 is important for plants, specifically during the process of photosynthesis; although high levels of CO2 may be detrimental to some plants. Thus it is important to understand how future elevated levels of CO2 may affect both native and non-native plants. The response of plants to elevated levels of CO2 include: increased (i) biomass, (ii) height, (iii) inter-nodal length, (iv) pollen production, (v) woodiness due to assimilation of additional carbon, and (vi) water use efficiency due to reduced stomatal conductance. Many of these altered attributes may affect the species survival in a warmer world. They could also affect herbicide efficiency either through uptake rates of the active ingredient or by increased biomass which enables plants to better withstand the effective of the herbicide.