Crop-pest yield loss: A diagnostic study in the Kenya highlands*

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Abstract
Pestyield loss in maize and beans in the Kenya highlands is studied using farmer elicited information. Total losses due to pests in maize and beans were estimated at 57 and 42%, respectively. As a group, insectpests were more important than disease pests. Regression methods were used to test the relationship between crop yield loss and short- and long-term pest control practices. For maize, the short-term control, use of certified seed, was positively associated with yield loss, while labour availability was negatively associated. Seeding rate and use of fertilizer and manure were not significant. For beans, fertilizer use resulted in a lower yield loss while random sowing methods resulted in a higher loss. Labour, manure use and cultivar sown were not significant. Greater intensity of maize/bean intercropping was negatively related to yield loss for both crops.

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