A comprehensive discussion about the issues concerning pre-packaged fungicide mixes, which can elevate the risk of developing pathogens that are resistant to treatment. Strategies for avoiding resistance are included in the discussion.
A systems approach for the production of healthy nursery stock. The manual, published by the Oregon Association of Nurseries, is divided into 3 main parts. A systems approach introduction, voluntary best practices for your nursery, and the next step: systems approach certification.
Research was conducted to take advantage of the reduction in plant size and vigor often associated with induced polyploidy. The principle objectives were to induce polyploidy in seedlings from H. acetosella ‘Panama Red’ and to evaluate the effects on growth, morphology, and fecundity.
The black vine weevil Otiorhynchus sulcatus (F.) is the primary insect pest of field and container-grown woody ornamentals in the Pacifc Northwest (PNW). These studies were conducted to determine the natural occurrence of soil-borne entomopathogens in PNW nursery soils and determine their virulence to black vine weevil.
Studies on the biological control of black vine weevil (BVW) in container-grown ornamentals were conducted to determine the persistence and ecology of Metarhizium anisopliae (Metchnikoff) Sorokin incorporated into peat and bark-based potting media with and without a crab meal amendment in container-grown Picea abies ‘Nidiformis.’
Four cultivars of basil were inoculated or not with the arbuscular mycorrhizal fungus (AMF), Rhizophagus (formerly Glomus) intraradices (Schenck & Smith) Walker & Schubler and grown with a fertilizer to access whether 1) P availability and inoculation with AMF influences the phenolic composition of basil; and 2) treatment effects on phenolic composition are related to plant nutrient status.
In this study researchers evaluated the chicoric acid concentrations in dried and fresh basil (Ocimum basilicum) products available to consumers and how these concentrations compare to those from E. purpurea plant and products.
Deciduous and evergreen cultivars of container-grown Rhododendron were used to determine whether spraying plants with urea in the fall altered 1) uptake of nutrients other than N in the year of application and the following growing season; and 2) allocation of nutrients other than N in the year of application and the following growing season.
The purpose of this study was to determine: 1) how rate of N application during the vegetative stage of production influences plant growth; 2) whether plant N content before cold storage influences plant growth and flower development during forcing; and 3) whether urea sprays in the fall increase N storage before cold storage and plant growth and flower development during forcing.
An examination of the advantages and affects of nitrogen (N) foliar feeding on the quality of nursery plants. Topics include which N formulation is best, fall applications, advantages of fall foliar nitrogen, and spring applications.