Canadian Forest Service Publications

A first record of Pestalotiopsis clavispora in Argan mass cutting propagation: Prevalence, prevention and consequences for plant production. 2009. Bakry, M.; Bussières, G.; Lamhamedi, M.S.; Margolis, H.A.; Stowe, D.C.; Abourouh, M.; Blais, M.; Bérubé, J.A. Phytoprotection 90: 117-120.

Year: 2009

Available from: Laurentian Forestry Centre

Catalog ID: 39623

Language: English

CFS Availability: PDF (request by e-mail)

Abstract

A trial involving the mass propagation of Argania spinosa cuttings was established following two protocols: in mini-bouturathèques without mist and in a greenhouse under mist. Symptoms of petiole necrosis, foliar yellowing and abundant black acervuli were observed under both protocols. These symptoms were responsible for a 90% mortality rate in the mini-bouturathèques while under the mist treatment premature fatal necrosis of the apical buds resulted in 100% mortality. The disease’s causal agent, Pestalotiopsis clavispora, was identified on the basis of its morphological characteristics and by molecular analysis. Alternating weekly treatments of systemic and contact fungicides resulted in a 41% success rate in controlling this pathogen, described for the first time on argan cuttings.

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