View source for Oecologia (2021) 196, 1005-1015

{{Publication
|Publication authors=Benjamin W. Lee, Saumik Basu, Sayanta Bera, Clare L. Casteel and [[David W. Crowder]]
|Author Page=David W. Crowder
|Publication date=2021
|dc:title=Responses to predation risk cues and alarm pheromones affect plant virus transmission by an aphid vector
|Publication journal=Oecologia
|prism:volume=196 (4)
|prism:startingPage=1005
|Last page=1015
|External link=https://dx.doi.org/10.1007/s00442-021-04989-6
|Publication abstract= Herbivores assess predation risk in their environment by identifying visual, chemical, and tactile predator cues. Detection of predator cues can induce risk-avoidance behaviors in herbivores that affect feeding, dispersal, and host selection in ways that minimize mortality and reproductive costs. For herbivores that transmit plant pathogens, including many aphids, changes in herbivore behavior in response to predator cues may also affect pathogen spread. However, few studies have assessed how aphid behavioral responses to different types of predator cues affect pathogen transmission. Here, we conducted greenhouse experiments to assess whether responses of pea aphids (''Acyrthosiphon pisum'') to predation risk and alarm pheromone (E-β-Farnesene), an aphid alarm signal released in response to predation risk, affected transmission of ''Pea enation mosaic virus'' (PEMV). We exposed ''A. pisum'' individuals to risk cues, and quantified viral titer in aphids and pea (''Pisum sativum'') host plants across several time periods. We also assessed how ''A. pisum'' responses to risk cues affected aphid nutrition, reproduction, and host selection. We show that exposure to predator cues and alarm pheromone significantly reduced PEMV acquisition and inoculation. Although vectors avoided hosts with predator cues, predator cues did not alter vector reproduction or reduce nutrient acquisition. Overall, these results suggest that non-consumptive effects of predators may indirectly decrease the spread of plant pathogens by altering vector behavior in ways that reduce vector competence and pathogen transmission efficiency.
|AbstractCC=Yes
|Research topic=transmission/dispersal of plant diseases
|Research2P=environment - cropping system/rotation
|Is book=No
}}
{{Pest record
|Pest=Acyrthosiphon pisum
|Crop=Pea (Pisum sativum)
|Quarantined=No
}}
{{Pest record
|Pest=Pea enation mosaic virus-1
|Crop=Pea (Pisum sativum)
|Quarantined=No
}}