Effect of two insect pests on Acacia auriculiformis tree growth and form in Australia's Northern Territory


Citation

Montagu K . D ., . and Woo K . C ., . Effect of two insect pests on Acacia auriculiformis tree growth and form in Australia's Northern Territory. pp. 492-502. ISSN 0128-1283

Abstract

Effect of two insect pests on Acacia auriculiformis tree growth and form in Australia's Northern Territory. The occurence and damage caused by two insect pests of Acacia auriculiformis was assessed four months after planting in two clonal seed orchards containing trees from the Queensland Papua New Guinea and Northern Territory provenances. The effect of insect damage on tree growth and form was subsequently measured over a 16-month period. Four months after planting when the trees averaged 1.3m in height the insects Platymopsis humeralis F. (Coleoptera Cerambycidae) and Mictis profana F. (Hemiptera Coreidae) were present on 8 and 36 per cent of the trees respectively. However both the insects caused damage to more than 50 per cent of the trees at the two sites. Platymopsis humeralis girdled the main stem of the juvenile trees which reduced tree height growth by 0.4-0.5 m in the six months following girdling. Mictis profana caused the death of 10-15 per cent of the tree shoot tips but this had no measurable effect on three growth. No provenance variation was observed in either the degree of insect attack or effect on tree growth or form. Twenty months after planting there was no apparent effect on tree form and no further reduction in tree height growth.


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Abstract

Effect of two insect pests on Acacia auriculiformis tree growth and form in Australia's Northern Territory. The occurence and damage caused by two insect pests of Acacia auriculiformis was assessed four months after planting in two clonal seed orchards containing trees from the Queensland Papua New Guinea and Northern Territory provenances. The effect of insect damage on tree growth and form was subsequently measured over a 16-month period. Four months after planting when the trees averaged 1.3m in height the insects Platymopsis humeralis F. (Coleoptera Cerambycidae) and Mictis profana F. (Hemiptera Coreidae) were present on 8 and 36 per cent of the trees respectively. However both the insects caused damage to more than 50 per cent of the trees at the two sites. Platymopsis humeralis girdled the main stem of the juvenile trees which reduced tree height growth by 0.4-0.5 m in the six months following girdling. Mictis profana caused the death of 10-15 per cent of the tree shoot tips but this had no measurable effect on three growth. No provenance variation was observed in either the degree of insect attack or effect on tree growth or form. Twenty months after planting there was no apparent effect on tree form and no further reduction in tree height growth.

Additional Metadata

[error in script]
Item Type: Article
Additional Information: Summaries (En Ms)
AGROVOC Term: ACACIA AURICULIFORMIS
AGROVOC Term: PEST INSECTS
AGROVOC Term: COLEOPTERA
AGROVOC Term: HEMIPTERA
AGROVOC Term: DAMAGE
AGROVOC Term: GROWTH
AGROVOC Term: TREE FORM
AGROVOC Term: AUSTRALIA ACACIA AURICULIFORMIS
AGROVOC Term: INSECTOS DANINOS
AGROVOC Term: COLEOPTERA
Depositing User: Ms. Norfaezah Khomsan
Last Modified: 24 Apr 2025 05:52
URI: http://webagris.upm.edu.my/id/eprint/17927

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