Predicting the fundamental thermal niche of crop pests and diseases in a changing world: A case study on citrus greening

The Journal of Applied Ecology
Rachel A TaylorLeah R Johnson

Abstract

Predicting where crop pests and diseases can occur, both now and in the future under different climate change scenarios, is a major challenge for crop management. One solution is to estimate the fundamental thermal niche of the pest/disease to indicate where establishment is possible. Here, we develop methods for estimating and displaying the fundamental thermal niche of pests and pathogens and apply these methods to Huanglongbing (HLB), a vector-borne disease that is currently threatening the citrus industry worldwide.We derive a suitability metric based on a mathematical model of HLB transmission between tree hosts and its vector Diaphorina citri, and incorporate the effect of temperature on vectortraits using data from laboratory experiments performed at different temperatures. We validate the model using data on the historical range of HLB.Our model predicts that transmission of HLB is possible between 16 and 33°C with peak transmission at ~25°C. The greatest uncertainty in our suitability metric is associated with the mortality of the vectors at peak transmission, and fecundity at the edges of the thermal range, indicating that these parameters need further experimental work.We produce global thermal niche maps by plotting...Continue Reading

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Citations

Mar 3, 2020·Frontiers in Plant Science·Kaoutar El-MounadiHernan Garcia-Ruiz
Nov 17, 2020·Frontiers in Veterinary Science·Luis E Escobar
Aug 1, 2021·Parasites & Vectors·Fadoua El MoustaidLeah R Johnson

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