Priliminary study on die back of thuja trees
Journal of Kerbala for Agricultural Sciences,
2018, Volume 5, Issue 5, Pages 586-594
AbstractIsolation results from infected Thuja trees showed the existence ofPestalotiopsis funereal, Phoma herbarum ,. and Nigrospora oryzae . ,this is the first record on the Cedar in Iraq The pathogenicity test result showed the ability of the fungi to cause yellowing and browning plant leaves starting from crown area to plant tip and causing plant death after 3 months from inoculation time . Cedar wilting branches test showed total wilting after treatment with Phoma herbarum culture filtrate as compared toPestalotiopsis sp. and Nigrospora oryzae culture filtrate of three fungi had increased water loss in Cedar branches. The amount of water loss was significantly correlated with culture filtrate concentration and period of treatment.
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