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Economic analysis of classical biological pest control: a case study from Western Samoa



Economic analysis of classical biological pest control: a case study from Western Samoa



Proceedings: Integrated Pest Management in Tropical and Subtropical Cropping Systems ' 89 ( 1): 45-51



The biological control of the chrysomelid Brontispa longissima on coconuts in Western Samoa during 1984-87 is described. A steady decline in damage from 42.4% in 1984 to 15.4% in 1987 was noted, following the release of the parasitoids Tetrastichus brontispae and Asecodes sp. during 1981-86. The incidence of palms damaged by B. longissima in plantations and villages was 4 and 22.9%, resp. In American Samoa approximately 74% of all palms were infested compared with only 14.3% in Western Samoa.

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