Paraphoma crown rot of pyrethrum (Tanacetum cinerariifolium)

TY - JOUR

T1 - Paraphoma crown rot of pyrethrum (Tanacetum cinerariifolium)

AU - Moslemi, Azin

AU - Ades, Peter Kevin

AU - Groom, Tim

AU - Crous, Pedro

AU - Nicolas, Marc Edward

AU - Taylor, Paul William James

PY - 2016/8/3

Y1 - 2016/8/3

N2 - Pyrethrum (Tanacetum cinerariifolium) is commercially cultivated for the extraction of natural pyrethrin insecticides from the oil glands inside seeds. Yield-decline has caused significant yield losses in Tasmania during the last decade. A new pathogen of pyrethrum causing crown rot and reduced growth of the plants in yield-decline affected fields of northern Tasmania was isolated from necrotic crown tissue and described as Paraphoma vinacea. Multigene phylogenetic identification of the pathogen also revealed that P. vinacea was a new species different from other Paraphoma type strains. Glasshouse pathogenicity experiments showed that P. vinacea significantly reduced below-ground and total biomass of pyrethrum plants two months after inoculation. Dull-tan to reddish-brown discoloration of the cortical and sub-cortical crown tissue was observed in 100% of the infected plants. Paraphoma vinacea infected 75% of the plants inoculated with root dip and soil drench inoculation techniques in an inoculation optim...

AB - Pyrethrum (Tanacetum cinerariifolium) is commercially cultivated for the extraction of natural pyrethrin insecticides from the oil glands inside seeds. Yield-decline has caused significant yield losses in Tasmania during the last decade. A new pathogen of pyrethrum causing crown rot and reduced growth of the plants in yield-decline affected fields of northern Tasmania was isolated from necrotic crown tissue and described as Paraphoma vinacea. Multigene phylogenetic identification of the pathogen also revealed that P. vinacea was a new species different from other Paraphoma type strains. Glasshouse pathogenicity experiments showed that P. vinacea significantly reduced below-ground and total biomass of pyrethrum plants two months after inoculation. Dull-tan to reddish-brown discoloration of the cortical and sub-cortical crown tissue was observed in 100% of the infected plants. Paraphoma vinacea infected 75% of the plants inoculated with root dip and soil drench inoculation techniques in an inoculation optim...

U2 - 10.1094/PDIS-05-16-0628-RE

DO - 10.1094/PDIS-05-16-0628-RE

M3 - Article

SN - 0191-2917

VL - 100

SP - 2363

EP - 2369

JO - Plant Disease

JF - Plant Disease

IS - 12

ER -