Progress in Biological Control of Weeds with Plant Pathogens

Area of Science:

• Agricultural Science
• Plant Pathology
• Ecology

Background:

• Plant pathogens have been utilized for weed biological control since the 1970s.
• 36 fungal pathogens are approved for weed control in 18 countries, demonstrating an excellent safety record.
• Concerns persist regarding pathogen transfer to non-target plants, and quantitative impact data is limited.

Purpose of the Study:

• To review the role of plant pathogens in weed biological control.
• To highlight research approaches and challenges in bioherbicide development and commercialization.
• To explore potential distribution models for bioherbicides, particularly in low-income countries.

Main Methods:

• Review of scientific literature on plant pathogens for weed control.
• Analysis of registered bioherbicides and their commercial availability.
• Examination of case studies illustrating research and challenges in biological control.

Main Results:

• Excellent safety record for authorized fungal pathogens used in weed control.
• Limited quantitative data on pathogen impact on weed populations.
• Significant technological and market challenges hinder bioherbicide commercialization in developed countries.
• Potential for not-for-profit, small-scale bioherbicide systems in low-income countries.

Conclusions:

• Plant pathogens offer a safe and effective means of weed biological control.
• Further research is needed to quantify pathogen impact and address commercialization hurdles.
• Small-scale, localized bioherbicide production could be a viable strategy for weed management in resource-limited settings.