The influence of intercropping millet pennisetum typhoides burm with cowpea vigna unguiculata walp on the egg laying and development of bruchidius atrolineatus pic coleoptera bruchidae

Leroi, B.; Alzouma, I.; Huignard, J.

Agriculture Ecosystems and Environment 31(1): 39-48

1990


ISSN/ISBN: 0167-8809
DOI: 10.1016/0167-8809(90)90153-5
Accession: 007909574

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Abstract
Infestation of cowpea (Vigna unguiculata Walp) by Bruchidius atrolineatus (Pic) (Coleoptera: Bruchidae) is similar in monoculture or when intercropped with millet. The percentage of egg-infested pods and the average number of eggs per pod are similar in both types of crop. In mixed crops, the influence of the leaf cover decreases during the egg-laying period as the leaves dry up. When the leaf cover is very dense, there is no difference in the number of eggs laid on the cover, through more favourable temperature and humidity conditions. Present evidence suggests that a millet-cowpea intercropping system enhances the likelihood of seed losses from Bruchidae.