The Effect of Supplementary Pollination on Nut Set of Macadamia (Proteaceae)

Helen M Wallace; H I M V Vithanage; E M Exley

doi:10.1006/anbo.1996.0187

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The Effect of Supplementary Pollination on Nut Set of Macadamia (Proteaceae)

Journal article

Peer reviewed

The Effect of Supplementary Pollination on Nut Set of Macadamia (Proteaceae)

Helen M Wallace, H I M V Vithanage and E M Exley

Annals of Botany, Vol.78(6), pp.795-773

1996

DOI: https://doi.org/10.1006/anbo.1996.0187

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Abstract

Plant Biology

Macadamia integrifolia

Macadamia tetraphylla

macadamia

Proteaceae

cross pollination

self pollination

Apis mellifera

Trigona spp.

nut set

The effects of supplementary pollination on initial and final nut set and nut weight of theMacadamia cultivars, 'Hawaii Agricultural Experiment Station 246' and 'Hidden Valley A4', were assessed over 3 years at an orchard in eastern Australia. The final nut sets of racemes bagged to exclude insect pollinators were low in all 3 years of the study for both cultivars. This demonstrated the importance of exposure to insect visitors to increase nut set of these cultivars. However, the improved initial nut set by supplementary cross pollination of 246 in all 3 years of the study showed that insect pollination is inefficient compared to hand pollination. Furthermore, supplementary cross pollination of 246 increased final nut set by 57-97% in 1989 and increased nut weight by 15.0% and kernel weight by 20.0% in 1991. Cross pollination of A4 did not result in any consistent pattern of initial nut set and did not improve final nut set, but increased nut weight by 11.6% and kernel weight by 18.4%, with a higher percentage kernel recovery in 1991. In addition, supplementary self pollination of A4 increased nut sets in both 1989 and 1990. Yield and quality of both cultivars may benefit from increasing pollen transfer in the orchard.

Details

Title: The Effect of Supplementary Pollination on Nut Set of Macadamia (Proteaceae)
Authors: Helen M Wallace (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
H I M V Vithanage (Author) - CSIRO Division of Horticulture
E M Exley (Author) - University of Queensland
Publication details: Annals of Botany, Vol.78(6), pp.795-773
Publisher: Oxford University Press
Date published: 1996
DOI: 10.1006/anbo.1996.0187
ISSN: 0305-7364
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450103902621
Output Type: Journal article

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