On estimating non-linear response of fungal development under fluctuating temperatures |
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Authors: | X-M XU |
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Institution: | Plant Pathology and Weed Science Department, Horticulture Research International, East Malling, West Malling, Kent, ME19 6BJ, UK |
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Abstract: | Published research concerning disease development often shows that the response of fungal development to temperature is non-linear. Unfortunately, this non-linear response has often been ignored when predicting fungal development under varying temperatures using non-linear models and when deriving fungal development models from data collected under fluctuating temperatures. In this paper, the magnitude of non-linear effects on fungal development is shown to depend on the types of non-linear models and on the extent of temperature fluctuations. A method is described, which has been used in other disciplines to fit non-linear models directly to varying temperatures. Hypothetical data were generated to demonstrate the usefulness of this method. With the underlying rate equation being non-linear, models derived from average temperatures underestimate the rates at intermediate temperatures; the greater the temperature fluctuation, the greater this underestimation. |
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