Dutch Elm Disease : A Matter of Priorities
نویسندگان
چکیده
A Matter of Priorities Dr. Richard J. Campana, left foreground, participates in tree planting ceremony at 1967 International Shade Tree Conference at Fairmount Park, Philadelphia. Dr. Campana, chairman of the department of botany and plant pathology at the University of Maine and one of the foremost researchers actively searching for new methods of control for Dutch elm disease, is the immediate past president of ISTC. He agreed to relate his experiences and observations regarding the national DED program at the request of WEEDS TREES AND TURF magazine. The editors are happy to publish this extensive insight into the problem by Dr. Campana.
منابع مشابه
Study on two species of Ophiostoma in relation with Dutch elm disease in Iran
An investigation was carried out in some areas of Golestan Province including: Loveh forest, Soosara, Daland forest park, Tooskestan; Gilan Province including Siahkal and Asalem forests; Arasbaran and landscape of urban trees during 1999–2007. In this investigation, based on some morphological, physiological and molecular characteristics and also comparison with standard isolates two species Op...
متن کاملResistance to Dutch Elm Disease Reduces Presence of Xylem Endophytic Fungi in Elms (Ulmus spp.)
Efforts to introduce pathogen resistance into landscape tree species by breeding may have unintended consequences for fungal diversity. To address this issue, we compared the frequency and diversity of endophytic fungi and defensive phenolic metabolites in elm (Ulmus spp.) trees with genotypes known to differ in resistance to Dutch elm disease. Our results indicate that resistant U. minor and U...
متن کاملThe pathogen causing Dutch elm disease makes host trees attract insect vectors.
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 tha...
متن کاملSimultaneous induction of jasmonic acid and disease-responsive genes signifies tolerance of American elm to Dutch elm disease.
Dutch elm disease (DED), caused by three fungal species in the genus Ophiostoma, is the most devastating disease of both native European and North American elm trees. Although many tolerant cultivars have been identified and released, the tolerance mechanisms are not well understood and true resistance has not yet been achieved. Here we show that the expression of disease-responsive genes in re...
متن کاملOil Overdependence and Dutch Disease, KSA Evidence
In the context of recent oil prices fall and resulting budgetary problems faced by KSA, it is very interesting to examine the country’s overdependence on oil revenues. In this paper, we examine whether extreme oil dependence for Saudi Arabia is the symptom of Dutch Disease. We first provide a brief review of the literature on Dutch Disease and the natural resource curse. We then discuss the sym...
متن کامل