Elm trees and elm leaf beetles: patterns of herbivory
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Investigation and Determine of Ecological Characteristics of Sites of some old Broad-leaf and needle-leaf Trees in Zagros forests (Case study: Forests of Ilam Province)
. Introduction Old trees are important and key elements of forest sites and are of great value in terms of forest management, reforestation, silviculture and ecology. Although old trees constitute a small percentage of forest trees, they account for a large share of forest carbon reserve and play a vital role in carbon storage. Understanding the how geographical and site distribution of thes...
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Limited biological information about Phyllophaga ephilida , a major sweet potato pest in Louisiana, is available. In 2001 and 2002, a study was conducted in the laboratory to investigate the feeding preference of adult Phyllophaga ephilida (Say) (Coleoptera: Scarabaeidae) for the foliage of eight woody plant species: water oak ( Quercus nigra L.), live oak ( Quercus virginiana Mill.), red maple...
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 کاملStudy 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 کاملStatistical Correlations Between GLC Assay and Smaller European Elm Bark Beetle1 Bioassay2
American elm trees, Ulmus americana L., were sprayed with methoxychlor by helicopter or mist blower, and twig crotches were collected from sprayed trees for bio assay of Scolytus multistriatus (Marsham) and GLC as say. Correlations established between the 2 assays were Dutch elm disease, caused by the fungus Cerato cystis ulmi (Buisman) C. Moreau, is a serious shade tree problem in the Unite...
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تاریخ انتشار 2017