An experiment was performed to determine a more effective protocol for germinating C. americana seeds. It was hypothesized that scarification with sulfuric acid would aid in breaking seedcoat dormancy, thereby resulting in more rapid and uniform germination.
A report on Oregon State University affiliated research, which was conducted with the purpose of documenting chromosome number and genome size of Callicarpa species to add to the available information on the genus.
This study was conducted to evaluate the fertility of diploid and allotetraploid forms of Rhododendron L. 'Fragrant Affinity' and to determine if induced polyploidy is an effective method for restoring fertility in hybrids of distantly related rhododendrons.
The objectives of this study were 1) to elucidate the progenitor species of Rhododendron cultivars ‘Fragrans’, ‘Fragrans Affinity’, and ‘Fragrant Affinity’; and 2) to determine whether these cultivars are all distinct clones or possibly synonyms.
Pests and pathogens are a threat for growers that produce containerized nursery stock. The authors discuss how to reduce these threats by considering the type of containers and growing media they use, where they are sourced, how they are handled, and how they are stored.
As interest in compost grows, so does the need to better understand what compost is, and to learn about the limitations and advantages of particular composts. Suggestions are provided for how to use compost testing as a tool to get greater value from compost use.
Research was conducted at Oregon State University North Willamette Research and Extension Center with the objective of determining whether the addition of foliar fertilization would benefit a Christmas tree plantation or container-grown conifer operation.
Researchers evaluated the toxicity of glucolimnathin 1 and its degradation products on several important soilborne pathogens of high-value crops. Pests targeted in the studies included plant-parasitic nematode Meloidogyne hapla, fungus Verticillium dahliae, and oomycete Pythium irregulare.
These studies were conducted to determine the compatibility of M. anisopliae (F52) with a wide range of fungicides commonly applied to container-grown ornamentals for the management of soil-borne plant pathogens. In addition, the impact of fungicide application to M. anisopliae population in soilless potting media (bulk and rhizosphere soil) was also determined.
Research was conducted to determine the persistence of Metarhizium anisopliae (F52), measured as infectivity against black vine weevil larvae, in a soilless potting medium at six wholesale nursery locations across the Willamette Valley, Oregon.
OREGON STATE UNIVERSITY
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