Journal of the Australian Entomological Society (1992) 31, 71-78

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R.K. Mensah and J.L. Madden (1992)
Feeding behaviour and pest status of Ctenarytaina thysanura (Ferris and Klyver) (Hemiptera: Psyllidae) on Boronia megastigma (Nees) in Tasmania
Journal of the Australian Entomological Society 31 (1), 71-78
Abstract: Ctenarytaina thysanura is a phloem feeder and feeding by nymphs was restricted to the young, actively growing boronia shoots. During feeding C. thysanura produces honey dew and with high infestations, the boronia foliage becomes heavily contaminated with sugar rich excreta and in turn black sooty mould. Severely affected plants lose turgor, growth ceases and leaves absciss. Less severe infestations reduce vegetative growth and the initiation and formation of flower buds. Experimentally C. thysanura causes a 41.7% loss of flowers and suppresses oil yield. Year-old infested plants cease producing new nodes 56 d after initial infestation and growth ceases entirely within 98 d. Damage to the plant is cumulative and is most apparent as nymphs enter the 4th and 5th stages. Based on market values of flowers and costs of controlling the insects for 1988/89 and 1989/90, the economic-injury level for year-old boronia plants is 8 mature nymphs per terminal shoot.
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Full text of article
Database assignments for author(s): Robert K. Mensah

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Ctenarytaina thysanura Boronia (genus) Australia (South+SE)