منابع مشابه
The histology of minigrafting of Persian walnut trees cv. chandler
Compared to other techniques of propagation, grafting is the most successful and feasible technique for asexual propagation of walnut plants. There is little information about graft union formation in walnut. Therefore, the objective of this study was to evaluate histological events during graft union formation in Juglans regia L. cv. Chandler scions when minigrafted on the one-year-old seedlin...
متن کاملWalnut Twig Beetle (Coleoptera: Curculionidae: Scolytinae) Colonization of Eastern Black Walnut Nursery Trees
Thousand cankers disease, caused by the invasive bark beetle Pityophthorus juglandis Blackman and an associated fungal pathogen Geosmithia morbida M.Kolařík, E. Freeland, C. Utley, N. Tisserat, currently threatens the health of eastern black walnut (Juglans nigra L.) in North America. Both the beetle and pathogen have expanded beyond their native range via transport of infested walnut wood. Geo...
متن کاملUtilization of Fertilizer N by Walnut Trees (84-wmb3)
The broad objectives' of this project have included aspects of N deficiency including reassessment of the so-called N critical value, determination of tree N content and the amount of annual N uptake, assessment of the periodicity of N transport to leaves and fruit, and the efficiency of fertilizer N recovery using 15N-depleted(NH.hS04' The onset of yield reduction in N-deficient "Serr" and "Ha...
متن کاملPhylogeography of the Walnut Twig Beetle, Pityophthorus juglandis, the Vector of Thousand Cankers Disease in North American Walnut Trees
Thousand cankers disease (TCD) of walnut trees (Juglans spp.) results from aggressive feeding in the phloem by the walnut twig beetle (WTB), Pityophthorus juglandis, accompanied by inoculation of its galleries with a pathogenic fungus, Geosmithia morbida. In 1960, WTB was only known from four U.S. counties (in Arizona, California, and New Mexico), but the species has now (2014) invaded over 115...
متن کاملA Study and Comparison of Control Methods of Anthracnose Disease in Walnut Trees of Roodbar Region
Walnut Anthracnose is among the major diseases of walnut trees in Qazvin Province which is scattered as an epidemic disease in the recent years. This research is designed to study and comparison of control methods of Anthracnose disease in walnut trees of Roodbar region. After selecting the infected garden and implementing winter and spring spraying treatments, winter spraying treatment and con...
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ژورنال
عنوان ژورنال: Nature
سال: 1943
ISSN: 0028-0836,1476-4687
DOI: 10.1038/151705a0