Environmental Entomology (2001) 30, 23-30

Carmen López, Albert Sans, Luis Asin and Matilde Eizaguirre (2001)
Phenological model for Sesamia nonagrioides (Lepidoptera: Noctuidae)
Environmental Entomology 30 (1), 23-30
Abstract: The development time of different stages of Sesamia nonagrioides Léfèvbre was studied in the laboratory at constant temperatures in the range 10–36°C. The relationship between the developmental rate (1/d) and the temperature (°C) was determined using both linear and nonlinear (Logan type III) models. The fit of the linear regression in the temperature range 15–27.5°C and Logan type III equation was good (R² > 0.97). The lower developmental threshold, calculated using the linear model, was t_b = 12°C. The nonlinear model gave a higher threshold of T_max = 36°C, and an optimal developmental temperature of T_rmax = 30°C. The flights of S. nonagrioides were studied in Lleida, Spain, from 1984 to 1997, and the number of degree-days required for their occurrence was calculated. A relationship between the degree-days required for the first flight calculated by the averaging method and the degree-days required for estimated diapause termination was obtained (R² = 0.84). This relationship allowed the prediction of the first flight occurrence in the field. The degree-days required for the second and third generations were then calculated as 730 and 491, respectively.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Albert Sans

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sesamia nonagrioides		Spain (continental)