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Targeting biotypes of Dactylopius tomentosus to improve effective biocontrol of Cylindropuntia spp. in Australia

Jones, P.K. and Holtkamp, R.H. and Day, M.D. (2014) Targeting biotypes of Dactylopius tomentosus to improve effective biocontrol of Cylindropuntia spp. in Australia. In: 19th Australasian Weeds Conference, September 2014, Tasmanian Weed Society, Hobart, Tasmania.

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Article Link(s): http://caws.nzpps.org/awc/2014/awc201410551.pdf

Abstract

Seven Dactylopius tomentosus (Lamarck) biotypes were collected from a range of Cylindropuntia spp. in Mexico, South Africa and United States of America (USA) and imported into quarantine facilities at the Ecosciences Precinct. Host range trials were conducted for each biotype and further assessed against the Cylindropuntia species that are naturalised in Australia to determine the most effective biotype for each species. Host range was confined to the Cylindropuntia for all seven biotypes. In the efficacy trials, C. imbricata (Haw.) F.M.Knuth was killed by the ‘imbricata’ biotype within 16 weeks and C. kleiniae (DC.) F.M.Knuth died within 26 weeks. Cylindropuntia
fulgida var. mamillata (DC.) Backeb. and C. imbricata were killed by the ‘fulgida’ biotype within 18 weeks. On-going trials suggest that C. rosea (DC.) Backeb. could be controlled by either the ‘acanthocarpa’ or the ‘acanthocarpa × echinocarpa’ biotypes. Cylindropuntia
spinosior (Englem.) F.M.Knuth was not susceptible to any of the D. tomentosus biotypes assessed. A clear designation of which D. tomentosus biotype is most suited for each Cylindropuntia species will improve and increase the effectiveness of biological control of these weed species

Item Type:Conference or Workshop Item (Paper)
Business groups:Biosecurity Queensland
Keywords:Biotype, efficacy trial, biological control.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Organic plant protection. Biological control
Plant pests and diseases
Plant pests and diseases > Weeds, parasitic plants etc
Deposited On:19 Nov 2014 00:43
Last Modified:08 Jun 2015 16:02

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