Control of Weeds with Bioherbicides

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Weeds are major problems across multiple ecosystems, from broad-acre cropping to rangelands, water bodies, natural systems, and recreation areas (see the sidebar titled Weeds or Invasive Plants). They are unwanted plants that under certain circumstances can have negative impacts by, for example, competing against crops and native plants for water, light, and nutrients (139); altering fire regimes and intensity due to abundant biomass production

Any living organisms that can suppress the growth of weeds are broadly considered biocontrol agents, although specialist agents such as arthropods (insects, mites) and plant pathogens are more appropriate and widely used for targeted weed control.

Table 1 Information and current status (as of November 2019) of bioherbicides with living plant pathogens as active ingredients that have been registered worldwide