The Potential for Pest Management Using Plant-Derived Signaling Compounds

Abstract

Herbivory-induced plant volatiles (HIPVs), artificially damaged plant volatiles (ADPVs), plant hormones, and related compounds mediate plant–herbivore, plant–carnivore, and plant–plant interactions and represent promising tools for sustainable pest management. First, we describe a key ecological function of HIPVs: the attraction of natural enemies of herbivorous insects. Then, we present a case study on the use of HIPVs in greenhouses within a satoyama landscape (see Section Features of the Satoyama Landscape in the Research Area Called Miyama for a definition of satoyama). In this study, dispensers containing a synthetic HIPV blend, coupled with sugary food feeders, enabled the native parasitoid Cotesia vestalis to suppress diamondback moth (Plutella xylostella) larvae. We then review plant–plant communication mediated by HIPVs and ADPVs, emphasizing compound specificity, the metabolic conversion of exogenous volatile alcohols, and field evidence showing that early exposure to weed-derived ADPVs can reduce herbivory and, in some cases, increase crop yield, while noting that some ADPV sources may have negative effects. Next, we synthesize evidence on the exogenous application of jasmonic acid (JA), salicylic acid (SA), and related compounds, focusing on their effects on herbivores and their natural enemies. Finally, we discuss how combinations of signaling compounds, appropriate formulations, and habitat management strategies can facilitate information-based pest management while reducing reliance on conventional insecticides.