Antimicrobials to Control Plant Diseases

  • Compounds identified may be useful in preventing or controlling a broad class of plant pathogens including Candidatus Liberibacter spp., Clavibacter spp., Pseudomonas spp.,
  • Compounds can be used in combination with existing or new formulations for durable disease resistance management.
  • Compounds identified had diverse chemistries, bioactivity profiles, and modes of action. Hence, the compounds could be combined or rotated with existing active ingredients for effective disease management solutions.


Several plant bacterial pathogens are devastating to agriculture. Overreliance on a few antimicrobials commonly used in agriculture to treat diseases is not a sustainable or durable strategy. Deploying new active ingredients to control plant pathogens is hence important. Researchers at Texas A&M AgriLife Research screened over 200 compounds and identified a set of compounds that show promise in controlling plant bacterial diseases such as those caused by Candidatus Liberibacter spp., presumptive causal agents of potato zebra chip, tomato vein greening, and citrus greening disease. Some of these compounds are already registered in the U.S. and other countries as disinfectants, antiprotozoal, antihistamines, and antimicrobials, however, the novelty of this invention is their deployment in controlling plant diseases. The research to date includes efficacy testing in Candidatus Liberibacter-infected citrus and potato microbial hairy root assays, also developed by AgriLife Researchers due to the unculturable nature of these pathogens, potato whole plant assays, and in vitro efficacy studies on multiple plant-associated pathogens such as Clavibacter spp., Pseudomonas spp., and Agrobacterium spp. Results to date show that the antimicrobials have broad-spectrum efficacy against multiple pathogens and can control disease in infected plants

Contact Information

Name: Robert Brummett


Phone: 979-458-2635