rna-biocontrol
RNA biocontrol is an emerging pest and pathogen management strategy that uses RNA interference (RNAi) to silence essential genes in target organisms such as insects, fungi, or nematodes without harming the plant host. By applying or engineering small RNA molecules that are sequence-specific to a pest's vital genes, this approach offers a highly targeted alternative to broad-spectrum chemical pesticides. For plant science, it represents a promising tool for crop protection that can reduce agrochemical inputs while minimizing off-target ecological impacts.
open_in_new WikipediaPubMed · 2026-04-16
Plants use tiny molecular signals called small RNAs to coordinate defenses across their entire body and even fire them like weapons into attacking fungi and other pathogens. Researchers are now harnessing this natural system to develop spray-on RNA treatments that could replace or reduce chemical pesticides in farming.
Small RNAs travel long distances through plant tissue via plasmodesmata and the phloem, enabling whole-plant immune coordination rather than only local cell-level responses.
Cross-kingdom RNA interference (ckRNAi) allows plant-derived RNAs to silence genes inside fungal and oomycete pathogens, forming the basis of two crop-protection strategies: Host-Induced Gene Silencing (HIGS) and Spray-Induced Gene Silencing (SIGS).
Key delivery challenges — including environmental RNA degradation and inconsistent uptake by different pathogens — are being addressed through nanocarriers, synthetic biology, and machine-learning design tools.