Managing Phytophthora

Plant disease

Oregon State University affiliated author discusses the top 10 tips for preventing disease in nurseries. Specific topics addressed include site selection and drainage, sanitation practices, disease free plant sources, plants in container, and irrigation.

Impact of Fungicides on Metarhizium anisopliae in the Rhizosphere, Bulk Soil and In Vitro

Insects
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.

Irrigation Frequency Alters Nutrient Uptake in Container-grown Rhododendron Plants Grown with Different Rates of Nitrogen

Irrigation
A report on the influence of irrigation frequency and rate of nitrogen (N) application on uptake of other nutrients in one deciduous and two evergreen cultivars of Rhododendron grown in containers for 1 year. Researchers also evaluated whether nutrient concentrations in different structures and ratios of N to other nutrients in leaves and whole plants could be used to detect the influence of irrigation frequency on the relationship between N and other nutrients.

Changes in Polyamine Content and Localization of Pinus sylvestris ADC and Suillus variegatus ODC mRNA transcripts During the Formation of Mycorrhizal Interaction in an In Vitro Cultivation System

Propagation
Research report detailing a study conducted on the involvement of polyamines (PAs) in the interaction between Pinus sylvestris L. seedlings and an ectomycorrhizal fungus Suillus variegatus (Swatz: Fr.) O. Kunze in an in vitro cultivation system.

Frequency and Intensity of Root Colonization by Ericoid Mycorrhizal Fungi in Nursery Production of Blueberry Plants

Nursery Crops
A report on a survey conducted on commercial nursery plants produced from tissue culture and cuttings to determine when or if ericoid mycorrhizal fungi (EMF) colonize blueberry plants under nursery cultural methods.

Inoculation with Ericoid Mycorrhizal Fungi Alter Root Colonization and Growth in Nursery Production of Blueberry Plants from Tissue Culture and Cuttings

Propagation
The objectives of this work were to determine whether inoculation of blueberry nursery plant with EMF influences rooting, subsequent plant growth, or mycorrhizal colonization of blueberry plants produced from tissue culture and cuttings.

Growth and Nutrient Use of Ericaceous Plants Grown in Media Amended with Sphagnum Moss Peat or Coir Dust

Nursery Crops
The objectives of the USDA-ARS affiliated study were to determine whether growth, nutrient use, and storage components of ericaceous plants differ when grown in media amended with varying proportions of sphagnum peat or coir.

Application of Ectomycorrhizal Fungi in Vegetative Propagation of Conifers

Plant Propagation
A report on the potential use of ectomycorrhizal fungi in vegetative conifer production to increase adventitious shoots and enhance root formation and/or subsequent root branching. The authors specifically discuss in vivo cutting production, in vitro organogenesis and somatic embryogenesis.

Update on Tomato Spotted Wilt Virus

Greenhouse Crops
Increasing number of reports of greenhouse crops displaying symptoms of tomato spotted wilt virus (TSWV) prompted the authors to address the issue. Topics discussed are; the history of TSWV in the US, the wide variety of ornamental and non-ornamental hosts, symptoms, and control.

Lilac...Year-Round Cut Flower? Duel Purpose Plant?

Greenhouse Crops
A guide for the production of lilacs for the duel purposes of cut-flower production and landscape plantings. The history of the lilac as a forced, cut flower is summarized along with descriptions of species and cultivars, growth and development, forcing and flowering, and propagation methods.

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