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Factors affecting the emergence of Hypothenemus hampei (Coleoptera: Scolytidae) from coffee berries

Published online by Cambridge University Press:  10 July 2009

P.S. Baker ,
C. Ley ,
R. Balbuena  and
J.F. Barrera
P.S. Baker*
Affiliation:
Centro de Investigaciones Ecológicas del Sureste, Apartado Postal 36, Tapachula, Chiapas 30700, MX
C. Ley
Affiliation:
Centro de Investigaciones Ecológicas del Sureste, Apartado Postal 36, Tapachula, Chiapas 30700, MX
R. Balbuena
Affiliation:
Centro de Investigaciones Ecológicas del Sureste, Apartado Postal 36, Tapachula, Chiapas 30700, MX
J.F. Barrera
Affiliation:
Centro de Investigaciones Ecológicas del Sureste, Apartado Postal 36, Tapachula, Chiapas 30700, MX
*
P.S. Baker, IIBC, Gordon St, Curepe, TT.
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Abstract

Emergence of coffee berry borer, Hypothenemus hampei (Ferrari), from infested coffee berries (Coffea arabica) was studied in the laboratory under controlled temperature and relative humidity (RH) regimes. Low humidities (<60% RH, 25°C) provoked rapid evacuation of adults. Emergence was at a minimum at 90% RH. A steady increase in emergence occurred at values from 90 to 100% RH. Emergence was low below 20°C (90 and 100% RH) and increased markedly between 20 and 25°C. There was no significant increase in emergence above 25°C. Using a simple flight event recorder, emergence flight times were found to peak at the time of maximum daily ambient temperatures on successive days. Under constant temperature conditions successive peaks of emergence were not seen. Results are discussed in relation to control and sampling procedures.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 82 , Issue 2 , June 1992 , pp. 145 - 150
Copyright
Copyright © Cambridge University Press 1992

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