Summary
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(i)
The growth of ca. 100 individuals of a small deciduous tree Euphorbia pyrifolia, of different ages and edaphic regimes, and with different levels of infestation by the coccid Icerya seychellarum, has been studied on Aldabra Atoll over two years (1976–1978). Infestation on leaves ranged between 0 and 1.3 mg dry weight of coccids cm-2 of total leaf area.
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(ii)
Field observations and an experiment in which coccids were “seeded” on to transplanted trees showed a preference of coccids to feed on senescing leaves rather than on green leaves. Deterrence by green leaves is discussed.
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(iii)
Highest infestations developed on trees which produced the most senescent leaf material early in the wet season. The rate of leaf production on the heaviest infested trees was 36% of that on lightly infested trees.
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(iv)
The level of coccid infestation did not depend on the concentration of soluble nitrogen in senescing leaves but on the total amount of nitrogen exported. The level of soluble nitrogen in green leaves was reduced in heavily infested leaf clusters.
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(v)
Experimental clearance of coccids by insecticide showed that 0.7 mg cm-2 of coccids reduced the rate of leaf growth by 52%. This corresponded closely to the effect of similar levels of coccids in the field.
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(vi)
Leaf infestation was positively correlated with the percentage of dead apices per tree and negatively correlated with the degree of branch extension.
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(vii)
It was concluded that leaf phenology influenced the development of coccid populations and that coccids significantly reduced plant growth.
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References
Beevers L (1976) Nitrogen metabolism in plants. E. Arnold (ed) London p 333
Dixon AFG (1970) Quality and availability of food for a sycamore aphid population. In: Animal Populations in Relation to their Food Resources. Watson A (ed) BES Symp 10:271–287
Dixon AFG (1975) Effect of population density and food quality on autumnal reproductive activity in the sycamore aphid. Drepanosiphum platanoides (Schr) J Animal Ecology 44:297–304
Eglington G, Gonzalez AG, Hamilton RJ, Raphael RA (1962) Hydrocarbon constituents of wax coatings of plant leaves. A taxonomic survey. Phytochemistry 1:89–102
Emden HF van, Bashford MA (1971) The performance of Brevicoryne brassicae and Myzus persicas in relation to plant age and leaf amino-acids. Ent exp et appl 14:349–60
Fennah RG (1959) Nutritional factors associated with the development of mealy-bugs on cocao. A report on Cocao Research 1957–8. Imperial College of Tropical Agriculture. Trinidad W.I. p 18–28
Fennah RG (1960) The water status of the host plant in relation to attack by sucking insects in the humid tropics. Report 7th Commonwealth Ent Congr July 1960. Commonwealth Institute of Entomology, London p 84–6
Fosberg FR (1974) Miscellaneous notes on the flora of Aldabra and neighbouring islands: III. Kew Bulletin 29:253–66
Gibbs RD (1975) The Chemotaxonomy of Flowering Plants. McGraw-Hill
Hill MG, Newbery DMcC (1980). The distribution and abundance of Icerya seychellarum (Westw) on Aldabra Atoll. (in press: Ecological Entomology)
Hnatiuk R, Merton LF (1979) The vegetation of Aldabra Atoll: a perspective. Atoll Res Bull. No 239:1–22
Kennedy JS (1958) Physiological condition of the host plant and susceptibility to aphid attack. Entomologia exp appl 1:50–65
Leopold AC, Kriedmann PE (1975) Plant growth and development. 2nd edition McGraw-Hill
Martin VT, Juniper BE (1970) The cuticles of plants. E Arnold Lond, p 347
McNeill S, Southwood TRE (1978) The role of nitrogen in the development of insect/plant relationships. In: Biochemical aspect of plant and animal co-evolution Phytochem Society for Europe Symp Series No 15 Academic Press, p 79–98
Montant C (1957) Les acides aminés libres des Euphorbes. CR Acad Sci (Paris) 245:1454–5
Southwood TRE (1972) The insect/plant relationship—an evolutionary perspective. In: Insect/plant relationships, Emden HF van (ed) Symp Royal Ent Soc No 6, p 3–30
Stoddart DR, Mole LU (1977) Climate of Aldabra Atoll. Atoll Res Bull No 202:1–26
Stoddart DR, Taylor JD, Fosberg FR, Farrow GE (1971) Geomorphology of Aldabra Atoll Phil Trans Roy Soc Lond B 260:31–65
Way MJ (1968) Intra-specific mechanism with special reference to aphid populations. In: Southwood TRE Insect Abundance Symp Royal Ent Soc No 4, p 18–36
Woolhouse HW (1967) The nature of senescence in plants. In: Woolhouse HW Aspects of the Biology of Ageing SEB Symp 21:179–213
Wratten SD (1974) Aggregation in the birch aphid Euceraphis punctipennis (Zett) in relation to food quality. J Animal Ecology 43:191–8
Zimmermann M (1969) Translocation of nutrients. In: Wilkins MB Physiology of Plant Growth and Development, McGraw-Hill NY, p 381–417
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Newbery, D.M. Interactions between the coccid, Icerya seychellarum (Westw.), and its host tree species on Aldabra Atoll. Oecologia 46, 171–179 (1980). https://doi.org/10.1007/BF00540123
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DOI: https://doi.org/10.1007/BF00540123