orchard workers in north china are highly exposed to orchard pollens, especially peach and other rosaceae family pollens during pollination season. the aim of this study was to investigate whether occupational allergy to peach tree pollen as a member of rosaceae family is ige-mediated and to evaluate the cross-reactivity among rosaceae family pollens. allergen skin test and conjunctival challen...

Minimum cost spanning tree problems try to connect agents e¢ ciently to a source when agents are located at di¤erent points in space and the cost of using an edge is …xed. We examine solution concepts to divide the common cost of connection among users, and revisit the dispute between two of the most familiar solutions: the Kar and folk solutions, both based on the familiar Shapley value. We ch...

Increasing interest in cryopreservation of dormant buds reveals the need for better understanding of the role of dormancy in cryotolerance. Dormancy stage and low-temperature survival of vegetative apple buds (Malus domestica Borkh.), cultivars 'Sampion' and 'Spartan', collected from orchard were evaluated during three seasons contrasting in temperature and precipitation throughout the arrested...

The project ‘Mycorrhizal symbioses of transgenic apple trees with increased resistance against fungal pathogens’ (Subproject of the framework ‘Biosafety of transgenic woody plants’, supported by the German Federal Ministry for Education and Research) investigates whether the transformation of apple trees with fungal chitinase encoding genes besides increasing resistance against fungal pathogens...

Modern non-destructive optical-reflectance-based techniques for estimation of pigment (chlorophyll, carotenoid, anthocyanin, and flavonol) contents, the rate of onand off-tree ripening as well as for detection of common physiological disorders, such as sunscald, superficial scald, and water core, and other damages to apple fruit are reviewed with an emphasis on the methods developed by the auth...

Objectives: The overall objective is to determine the physiological limitation of nitrate uptake by Fuji apple trees on M9 rootstocks in the spring and early summer. This includes: • Measuring the influence of soil temperature on nitrate uptake by the roots • Determining the impact of tree N status on nitrate uptake, by considering that during the period of N remobilisation from storage, xylem ...

Prior research identified cultural and biologically active methods, which when applied independently, provide partial control of the pathogen complex that incites apple replant disease and enhanced yield of Gala on M.26 rootstock in orchard trials. In previous studies (Mazzola et al., 2001. Phytopathology 91:673-679), soil amendments were identified that effectively controlled certain elements ...

The University of Vermont Apple Program received a USDA grant to study the long-term effects of “particle film technology” on Northeast apple orchards. This technology has been commercially available to growers since 2001 in the kaolin clay–based product Surround. Surround is viewed as a potential alternative for some organophosphate uses in orchards. It is considered a “Reduced Risk Pesticid...