Dispersal of scandium-46-labeled Pantorhytes weevils in Papuan cacao plantations
The movement of adult apterous cacao weevils, Pantorhytes szentivanyi Mshl. (Coleoptera: Brachyderinae) marked with scandium-46 was studied in cacao plantations with open or closed canopies. A diffusion model of dispersal was used to calculate diffusivities (D). These were higher in a closed canopy (D = 0.75 m2/day) than in open canopy (D = 0.16 m2/day). This reflects the more rapid dispersal occurring when the branches of adjacent tree are touching. In a closed canopy plantation, the calculated probable distance moved by any individual in a month was 14-25 m (P = 0.1-0.001)
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| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1971
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| Subjects: | THEOBROMA CACAO, INSECTOS DAÑINOS, PANTORHYTES, COMPORTAMIENTO, VUELO, DISTRIBUCION NATURAL, ECOLOGIA ANIMAL, TECNICAS DE TRAZADORES, PAPUA NUEVA GUINEA, |
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