Climate change impacts on plant canopy architecture: implications for pest and pathogen management

Pangga, I.B. and Hanan, J. and Chakraborty, S. (2012) Climate change impacts on plant canopy architecture: implications for pest and pathogen management. European Journal of Plant Pathology . pp. 1-16.

[img] PDF - Published Version
Restricted to ICRISAT researchers only


Climate change influences on pests and pathogens are mainly plant-mediated. Rising carbon dioxide and temperature and altered precipitation modifies plant growth and development with concomitant changes in canopy architecture, size, density, microclimate and the quantity of susceptible tissue. The modified host physiology and canopy microclimate at elevated carbon dioxide influences production, dispersal and survival of pathogen inoculum and feeding behaviour of insect pests. Elevated temperature accelerates plant growth and developmental rates to modify canopy architecture and pest and pathogen development. Altered precipitation affects canopy architecture through either drought or flooding stress with corresponding effects on pests and pathogens. But canopy-level interactions are largely ignored in epidemiology models used to project climate change impacts. Nevertheless, models based on rules of plant morphogenesis have been used to explore pest and pathogen dynamics and their trophic interactions under elevated carbon dioxide. The prospect of modifying canopy architecture for pest and disease management has also been raised. We offer a conceptual framework incorporating canopy characteristics in the traditional disease triangle concept to advance understanding of host-pathogen-environment interactions and explore how climate change may influence these interactions. From a review of recent literature we summarize interrelationships between canopy architecture of cultivated crops, pest and pathogen biology and climate change under four areas of research: (a) relationships between canopy architecture, microclimate and host-pathogen interaction; (b) effect of climate change related variables on canopy architecture; (c) development of pests and pathogens in modified canopy under climate change; and (d) pests and pathogen management under climate change.

Item Type: Article
Uncontrolled Keywords: Microclimate, Pathogen evolution, Polycyclic epidemics Elevated CO2,Rules of plant morphogenesis
Author Affiliation: University of the Philippines Los Baños, College, Laguna, Philippines, The University of Queensland, Brisbane, Australia, Queensland Bioscience Precinct,St. Lucia, Queensland, 4067, Australia
Subjects: Atmosperic Science > Climatology
Plant Protection
Divisions: General
Depositing User: Mr. SanatKumar Behera
Date Deposited: 27 Oct 2012 08:34
Last Modified: 27 Oct 2012 08:34
Official URL:

Actions (login required)

View Item View Item