Biology and Control of Root Weevils on Berry and Nursery Crops in Oregon

Insects
Researchers recently developed a mass rearing system for the black vine weevil (Otiorhynchus sulcatus) and strawberry root weevil (Otiorhynchus ovatus) and now are able to conduct controlled experiments to study their biology and to develop chemical and biological management systems.

Efficacy of Metarhizium anisopliae as a Curative Application for Black Vine Weevil (Otiorhynchus sulcatus) Infesting Container-Grown Nursery Crops

Insects
The objectives of this study were to determine the efficacy of a curative drench application of M. anisopliae for controlling black vine weevil (BVW) larval infestations in container-grown nursery plants and the effect of temperature on the rate of fungal growth and speed of kill.

Examination of the Interaction Between the Black Vine Weevil (Coleoptera: Curculionidae) and an Entomopathogenic Fungus Reveals a New Tritrophic Interaction

Insect
The purpose of this study was to characterize the behavior of black vine weevil larvae, Otiorhynchus sulcatus (F.), in the presence of two possible control options: the synthetic pyrethroid bifenthrin and the entomopathogenic fungus Metarhizium anisopliae (Metch.) Sorokin.

Natural Occurrence of Entomopathogens in Pacific Northwest Nursery Soil and Their Virulence to the Black Vine Weevil, Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidea)

Insect
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.

Ecology of Metarhizium anisopliae in Soilless Potting Media and the Rhizosphere: Implications for Pest Management

Insects
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.’

Phenolic Composistion of Basil Plants is Differentially Altered by Plant Nutrient Status and Inoculation with Mycorrhizal Fungi

Management
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.

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.

Effects of Irrigation Frequency and Nitrogen Fertilizer Rate on Water Stress, Nitrogen Uptake, and Plant Growth of Container-grown Rhododendron

Nursery Crops

The purpose of this study was to investigate the influence of water stress (as induced by irrigation frequency) on growth and nitrogen (N) uptake of one deciduous and two evergreen cultivars of Rhododendron grown with different rates of N fertilizer in containers.

Nutrient Uptake and Loss by Container-grown Deciduous and Evergreen Rhododendron Nursery Plants

Nursery Crops
The objectives of the study were to determine whether N availability alters 1) the uptake of other nutrients; 2) allocation of other nutrients among different plant structures; 3) ratios of N uptake to uptake of other nutrients (N uptake ratios); and 4) nutrient losses during the fall and winter.

Chicoric Acid Levels in Commercial Basil (Ocimum basilicum) and Echinacea purpurea Products

Greenhouse
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.

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