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1 June 2000 Monitoring and Modeling of Field Infestation and Damage by the Maize Ear Borer Mussidia nigrivenella (Lepidoptera: Pyralidae) in Benin, West Africa
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Abstract

In many countries in West Africa, the pyralid ear borer Mussidia nigrivenella Ragonot occasionally causes severe damage to pre- and postharvest maize. Between 1992 and 1995, the distribution of and damage caused by M. nigrivenella were studied in Benin using survey data and an on-station field experiment. The borer was distributed across the whole country, and at maturity an average 25% of the ears sampled in maize fields were infested. Damage levels varied with agro-ecological zones and were highest in the Guinea Savannas. However, borer-related yield losses were comparatively low. Three applications of cypermethrin over the growing season did not provide sufficient control in the on-station field experiment. A model was developed to estimate maize losses caused by M. nigrivenella, using the percentage of infested ears, which explained 93% of the variance. Extrapolation of field data indicated a 25% yield loss once a 100% infestation of maize ears was reached. For surveys in maize fields the model is a valid tool for a rapid assessment of crop losses caused by M. nigrivenella.

Mamoudou Sétamou, Fritz Schulthess, Hans-Michael Poehling, and Christian Borgemeister "Monitoring and Modeling of Field Infestation and Damage by the Maize Ear Borer Mussidia nigrivenella (Lepidoptera: Pyralidae) in Benin, West Africa," Journal of Economic Entomology 93(3), 650-657, (1 June 2000). https://doi.org/10.1603/0022-0493-93.3.650
Received: 15 July 1999; Accepted: 1 February 2000; Published: 1 June 2000
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