Effect of cocoa pod borer, Conopomorpha cramerella, on cocoa yield and quality in Sabah, Malaysia
Cocoa pod borer (Conopomorpha cramerella) is a pest of cocoa in South-East Asia. It first appeared in Sabah, Malaysia, in 1980, but at that time there was no quantitative information on the damage it could cause. This paper describes the derivation of a damage relationship relating yield loss to pest attack level. When minor 60 percent of harvested cocoa pods show internal attack, yield loss is minor 5 percent, but with 90 percent of pods attacked yield loss is about 40 percent. When bean extraction from attacked pods is by hand, the major component of yield loss is loss of bean number, rather than reduced size of extracted beans, and the quality of the extracted beans is not impaired. Using scoops to remove beans from damaged pods reduces the overall yield loss, but is likely to result in reduced quality of the dry beans. The damage relationship is used to estimate losses in two commercial fields over a 3-year period (1982-1984). Annual yield losses ranged from 22 to 54 percent. Losses for the whole estate were estimated from estate records, and for the same years ranged from 42 to 49 percent.
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| Format: | biblioteca |
| Published: |
Oct
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| Subjects: | THEOBROMA CACAO, ACROCERCOPS CRAMERELLA, INSECTOS DEPREDADORES DE LOS FRUTOS, CICLO VITAL, INTERACCION PLAGA RENDIMIENTO, CALIDAD, PERDIDAS DE LA COSECHA, MALASIA, |
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