Protecting Container-grown Plants

Container

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.

Reducing Phytophthora

Plant Disease

Phytophthora species are some of the most problematic plant pathogens in nursery production systems. The Oregon State University affiliated author provides these top 10 tips which will help prevent this group of pathogens from taking hold.

Activity of Meadowfoam (Limnathes alba) Seed Meal Glucolimnanthin Degradation Products Against Soilborne Pathogens

Disease
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.

The Effects of Methyl Bromide Alternatives on Soil and Seedling Pathogen Populations, Weeds, and Seedling Morphology in Oregon and Washington Forest Nurseries

Disease
Fumigation treatments (a conventional methyl bromide – chloropicrin application and reduced-rate alternative fumigant treatments) and a nonfumigated treatment were evaluated at forest nurseries in Oregon and Washington for their effects on soil pathogen populations, weeds, and seedling morphology.

Influence of Isolation Method on Recovery of Pythium Species From Forest Nursery Soils in Oregon and Washington

Disease
In an attempt to identify Pythium species (common dampening off pathogens) associated with forest nursery soils, field surveys were conducted at three forest nurseries (two in Oregon and one in Washington) in 2008 using three isolation methods.

Spraying Leaves of Pear Nursery Trees with Urea and Copper Ethylenediaminetetraacetic Acid Alters Tree Nitrogen Concentration Without Influencing Tree Susceptibility to Phytophthora syringae

Disease
The specific objectives of the study were to determine whether susceptibility of field-grown pear trees to P. syringae is related to N concentration in stems and is altered by spraying trees with urea or the defoliant CuEDTA at different times in the autumn before and after inoculation with the pathogen.

A Systematic Approach to Diagnosing Plant Damage

Management
A comprehensive guide for determining the difference between nonliving and living causes of plant damage. The authors also provide a list of available references for identifing plant problems, references topics vary from general plant problem diagnosis to crop specific.

Ebb and Flow From an Engineer's Viewpoint

Irrigation
Agricultural engineering specialist affiliated with the University of Connecticut discusses the benefits of using an ebb and flow irrigation system in a greenhouse environment. Examples of crops successfully grown using the ebb and flow system are provided.

Capillary Beds

Nursery Crops
A discussion about capillary beds and also a how to guide on the construction of the beds for nursery production. Topics addressed include the construction of capillary beds, costs (labor, equipment, materials), root growth and development, leaf scorch, and pathogens.

Susceptibility of Pacific Northwest Conifers to Phytophthora Root Rot

Plant Disease
A study was conducted on Phytophthora root rot and the susceptibility of Pacific Northwest conifers. Twelve species of conifer were tested for susceptibility to five species of Phytophthora. Report includes methods, results, conclusions, and recommendations.

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