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The effect of temperature on development and hatching of the egg of Blepharidopterus angulatus (Fall.) (Heteroptera, Miridae)

Published online by Cambridge University Press:  10 July 2009

R. C. Muir
R. C. Muir
Affiliation:
East Malling Research Station, Maidstone, Kent
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Extract

Observations on the eggs of the predatory Mirid Blepharidopterus angulatus (Fall.), which plays a part in the control of Panonychus ulmi (Koch) on apple, were carried out in 1963–64. The eggs required chilling at 4.4 or 7.2°C. (40 or 45°F.) for 14–16 weeks to terminate diapause. The reciprocal of the time in days for the first eggs to hatch showed a linear relationship with temperature. The temperature at the threshold of development was found by calculation to be 4.7°C.; 409 day-degress C. were required for the first larvae to hatch and 727 for 50 per cent. of them to hatch. From this information and the daily maximum and minimum temperatures, the expected dates of first hatch at East Malling were calculated for the years 1958–64 and found to agree well with the dates on which the first larvae were observed in the field.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 57 , Issue 1 , November 1966 , pp. 61 - 67
Copyright
Copyright © Cambridge University Press 1966

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References

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