Journal
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 272, Issue 1580, Pages 2499-2503Publisher
ROYAL SOC
DOI: 10.1098/rspb.2005.3202
Keywords
Dutch elm disease; Ulmus americana; fungal pathogen; Ophiostoma novo-ulmi; Hylurgopinus rufipes; semiochemicals
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Dutch elm disease is caused by the fungal pathogen Ophiostoma novo-ulmi which is transmitted by the native elm bark beetle, Hylurgopinus rufipes. We have found that four semiochemicals (the monoterpene (-)- beta-pinene and the sesquiterpenes (-)-alpha-cubebene, (+)-spiroaxa-5,7-diene and (+)-delta-cadinene) from diseased American elms, Ulmus americana, synergistically attract H. rufipes, and that sesquiterpene emission is upregulated in elm trees inoculated with O. novo-ulmi. The fungus thus manipulates host trees to enhance their apparency to foraging beetles, a strategy that increases the probability of transportation the pathogen to new hosts.
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