Callosobruchus chinensis
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Author(s): Udo Schmidt
Source: Wikimedia Commons
Callosobruchus chinensis (Linnaeus, 1758) - (oriental cowpea bruchid)
The beetle is an important pest of stored legumes in tropical regions, especially Asia. It can also be introduced into temperate regions with legume shipments. The adult lays its eggs on dried legume seeds and the larvae bore into the grain, feeding on the endosperm. The attacked seeds do no longer germinate and become unsuitable for human consumption. Infestation levels can exceed 50%.
Adult beetles are 3-4 mm in length, oval in shape, chocolate/reddish brown in colour with some darker and lighter markings. The antennae are long and serrated. The female lays between 1-8 oval shaped and scale-like eggs per grain. Each larva completes the life cycle in a separate chamber. In India the insect breeds freely from March to November and hibernates in the larval stage during the winter. The adult emergence takes place from January to April.
| Vernacular names | |
|---|---|
| • Deutsch: | Kundekäfer Chinesischer Bohnenkäfer |
| • English: | oriental cowpea bruchid adzuki bean weevil |
| • Español: | gorgojo del caupi gorgojo del garbanzo |
| • Français: | bruche chin |
The pest causes maximum damage during February to August, when all its developmental stages exist simultaneously. Cowpea varieties with resistance to this pest are under development (e.g. Somta et al., 2008).
Synonyms:
Bruchus chinensis
- Other images of Callosobruchus chinensis (PaDIL - click to enlarge)
head of female
head of male
head of female
head of male
antenna of male
posterior end of female
posterior end of male
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