Entomologia Experimentalis et Applicata (2002) 105, 55-60

B. Graf, H.U. Höpli and H. Höhn (2002)
The apple sawfly, Hoplocampa testudinea: egg development and forecasting of egg hatch
Entomologia Experimentalis et Applicata 105 (1), 55-60
Abstract: The effect of temperature on egg development of the apple sawfly Hoplocampa testudinea Klug was studied under controlled conditions. Based on a linear model describing the relationship between temperature and developmental rates a thermal threshold of 6.9 °C and a thermal constant of 85 day-degrees were established. The experimental results were used to expand and parameterise an existing phenology model to include egg development and hatching of first instar larvae. The model thus became a valuable forecasting tool not only for adult emergence and the optimal monitoring period but also for egg hatch and the best timing of control measures against first instar larvae. The model was validated by comparing predictions with independent observations on egg-laying and subsequent hatching of first instar larvae under semi-field conditions.
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Link to article at publishers website
Database assignments for author(s): Benno Graf

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Hoplocampa testudinea