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Dispersal of Acalitus essigi to blackberry (Rubus fruticosus agg.) fruit


Davies, JT and Allen, GR and Williams, MA, Dispersal of Acalitus essigi to blackberry (Rubus fruticosus agg.) fruit, Entomologia Experimentalis et Applicata, 101, (1) pp. 19-23. ISSN 0013-8703 (2001) [Refereed Article]

DOI: doi:10.1046/j.1570-7458.2001.00886.x


The eriophyoid mite, Acalitus essigi (Hassan), is hypothesised to be responsible for redberry disease of blackberry (Rubus fruticosus L. agg.) fruit. Infested fruit ripen unevenly with affected drupelets becoming hard, inedible and bright red, whereas unaffected drupelets ripen evenly. As a first step toward possible control of this disease, the method and timing of dispersal of A. essigi onto developing blackberry fruit was examined. No mites were found on unopened flower buds or open flowers. However, infestation of fruit was found to commence during the green stage of fruit development and significantly increase during the red fruit stage. Although redberry symptoms were not observed, experimental exclusion of A. essigi to prevent the mite moving up the pedicel of open flowers by a sticky barrier significantly reduced A. essigi populations within the resultant fruit by over five fold that of control fruit. Although very low levels of aerial dispersal onto fruit cannot be discounted it was concluded that non-aerial or crawling dispersal via the fruit pedicel was the dominant method of blackberry fruit infestation.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Horticultural crop protection (incl. pests, diseases and weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Berry fruit (excl. kiwifruit)
UTAS Author:Davies, JT (Mr Jamie Davies)
UTAS Author:Allen, GR (Associate Professor Geoff Allen)
ID Code:21782
Year Published:2001
Web of Science® Times Cited:9
Deposited By:Agricultural Science
Deposited On:2001-08-01
Last Modified:2011-10-03

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