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1 April 2013 A Stage-Structured Model of Scaphoideus titanus in Vineyards
Federico Maggi, Cristina Marzachì, Domenico Bosco
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Abstract

We present a population model of the insect Scaphoideus titanus Ball, the leafhopper vector of Flavescence Dorée phytoplasma in Vitis vinifera L. The model accounted for the stage-dependent S. titanus life cycle rates and timing, and vineyard settings such as surface area, plant density, and sampling characteristics. The model parameters were estimated against 13 independent cases of population counting in both laboratory and field conditions, and returned a correlation coefficient in the range 86.4 to 99.1% with residuals in the range 3.5 to 26.3%. A statistical parametric analysis showed that the standard deviation of life cycle rates generally varied more than the one resulting from timing parameters. However, a stochastic sensitivity analysis showed that S. titanus dynamics were more susceptible to variations in timing than rate parameters. Analysis of scenarios of insecticide suppression efficiency and timing showed that S. titanus presence could be optimally controlled by a combination of suppression efficiency and timing. These results were instrumental to understand in which specific aspect of S. titanus life cycle could pest management operations be most effective to reduce S. titanus presence in vineyards, and possibly reduce the risk of Flavescence phytoplasma spread.

© 2013 Entomological Society of America
Federico Maggi, Cristina Marzachì, and Domenico Bosco "A Stage-Structured Model of Scaphoideus titanus in Vineyards," Environmental Entomology 42(2), 181-193, (1 April 2013). https://doi.org/10.1603/EN12216
Received: 21 July 2012; Accepted: 1 January 2013; Published: 1 April 2013
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KEYWORDS
Flavescence dorée
population dynamics
Scaphoideus titanus
Vitis vinifera
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