The external morphology and life cycle of Hypothenemus hampei (Ferrari)
A comprehensive and critical review of literature on the taxonomy, morphology, biology and behaviour of H. hampei is presented. Light and scanning Electron microscopic studies on the external morphology of the body and its appendages in the male and female reveal several distinguishing features of taxonomic importance. The males were lethergic, apparently blind (with about 26 ommatidia compared with 113 in the female), and incapable of locating a host or boring into it. The females preferred green berries over red ripe ones but bored faster into the latter; the time required for completion of boring (from initiation of boring in the pulp to the initiation of oviposition) was 178.72 ¦ 3.8 hour in the green and only 84.25 ¦ 3.2 hours in the red berries. The borer showed four distinct patterns of construction of the feeding galleries in the endosperm. The duration of different developmental stages on the red berries were embryonic 34.4 ¦ 0.13; first inster, 8.1 ¦ 0.25; second inster, 6.0 ¦ 0.1; and pupalpharate adult, 3.94 ¦ 0.14 days at room temperature (27{eth}C). The first inster larvae (mean head width, 0.23mm) contained both sexes but only females moulted to second inster (mean head width 0.33). However, the larvel-pupal moulting and adult emergence in the two sexes were synchronous. Oviposition started within 2 days of boring into the endosperm of red berries each female producing about 105.3 ¦ 2.7 eggs during 30-34 day ovarian cycle. Longevity of the male adult was 10 to 56 days, of reproducing females, till the end of ovipositional cycle, and of diapausing females, 20 to 24 weeks. The mean time for completion of generation was 39 ¦ 3.5 days in the red, and 45 ¦ 4.6 days in the green berries, permitting about 7 to 8 generations per year in Jamaican Lowlands
| Main Authors: | , |
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| Format: | biblioteca |
| Language: | eng |
| Published: |
Kingston (Jamaica) :
1983
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| Subjects: | INSECTOS DEPREDADORES DE LOS FRUTOS, COLEOPTERA, ANATOMIA ANIMAL, CICLO VITAL, HYPOTHENEMUS HAMPEI, |
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