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Viticulture & Enology Technical Newsletter : March 2011

Creator:: Oregon Wine Research Institute
Abstract:: Welcome to the March 2011 Viticulture & Enology Newsletter! We have a number of great articles from members of our team to keep you informed. Marcus Buchanan provides an update on the mealybug trapping efforts that have been in place in southern Oregon’s winegrape regions since 2009. Jay Pscheidt writes...
Resource Type:: Other
Full Text:: conditions: a study in synthetic media. Australian Journal of Grape and Wine Research 12, 69-78. Wibowo

OSU Wine and Grape Research and Extension Newsletter : August 2010

Creator:: Oregon State University. Extension Service
Abstract:: In this August issue, we focus on the grape berry. Articles within cover topics of cluster thinning, berry ripening, harvest., and various pests that can damage berries. Also, we provide information about how to conduct vine nutrient sampling at véraison to be sure to keep up with your nutrient program....
Resource Type:: Other
Full Text:: variability on yield, fruit composition and wine quality. Proceedings of the 16th International GiESCO

OSU Wine and Grape Research and Extension Newsletter : October 2009

Creator:: Oregon State University. Extension Service
Abstract:: As the 2009 growing season comes to a close, we prepared this newsletter to provide information on several viticulture and enology issues important to the Oregon winegrape industry. We begin with the most immediate topic of this season – wine production with Dr. James Osborne and importance of wine superstars...
Resource Type:: Other
Full Text:: on vineyard insect pest scouting across the state and raises awareness of new potential insect pests

OSU Wine and Grape Research and Extension Newsletter : May 2010

Creator:: Oregon State University. Extension Service
Abstract:: As the season progresses and all anticipate bloom, we hope you take the opportunity to read this issue. It is full of useful information on some pests of concern—both old and new—in the vineyard and winery: powdery mildew, grape rust mites, Spotted Wing Drosophila and Brettanomyces. We include other useful...
Resource Type:: Other
Full Text:: provided herein. Pest damage Grape rust mites are obligate pests of Vitis vinifera grapes. Vitis vinifera

OSU Wine and Grape Research and Extension Newsletter : February 2010

Creator:: Oregon State University. Extension Service
Abstract:: As the dormant season progresses towards the beginning of the 2010 vineyard season, we prepared this newsletter to focus on viticulture topics in disease management and cover cropping. With pruning taking place across vineyards in Oregon, Dr. Jay Pscheidt reminds vineyard managers to be on alert for canker diseases. Also,...
Resource Type:: Other
Full Text:: treatments of 0, 1X and 3X biomass mulch rates OSU Wine and Grape Research and Extension Newsletter

Integrated Production: Impact of Vineyard Floor Biodiversity on Vine Performance 1998-1999

Creator:: Candolfi-Vasconcelos, M. Carmo, Schonenberger, Patrik M., and Castagnoli, Steve
Abstract:: Increasing ecological awareness led to the conceptualization and implementation of sustainable production systems such as Integrated Production. Integrated Production (IP) aims at achieving optimum yields of high quality fruit utilizing environmentally safe procedures. Priority is given to the utilization and enhancement of natural regulating processes and to the reduction of...
Resource Type:: Technical Report
Full Text:: a Means of Controlling Pests. In: Biology in Pest and Disease Control. Jones, D.P., Solomon, M.E

Inflorescence necrosis, ammonium, and evidence for ferredoxin-glutamate synthase activity in grape (Vitis vinifera L.)

Creator:: Creasy, Glen L.
Abstract:: Death of flower parts near bloom due to inflorescence necrosis (IN) is associated with high ammonium (NH₄⁺) concentration in flower clusters, shade, cool wet weather preceding bloom, and excessive vigor. Faults in NH₄⁺ assimilation are suspected to cause a rise in NH₄⁺ concentration to toxic levels in flower cluster but...
Resource Type:: Dissertation
Full Text:: small: one Califomian winery has almost .40 million gallons of wine storage capacity (Cooke and Vilas

Relationships of ammonium and nitrate status with inflorescence necrosis in 'Pinot noir' grapevines

Creator:: Gu, Sanliang
Abstract:: Inflorescence necrosis (IN) is a recently described disorder in grapes characterized by partial or complete deterioration of the pedicel and rachis near bloom. Elevated levels of ammonium in the rachis are associated with the incidence of IN and hypothesized as the cause of the disorder. An incubation system with single-node...
Resource Type:: Dissertation
Full Text:: concentration of ammonium in flowers and fruit to that of the control. Incubation of cuttings with inhibitors

Girdling and shading effects on inflorescence necrosis and rachis composition of pinot noir grapevine

Creator:: Ibacache, Antonio E.
Abstract:: There are several grape disorders that reduce fruit set. One, millerandage, is from poor fertilization to produce "hen and chicken" or small seedless berries; while another, Coulure, is the failure of grape flowers to develop into berries. A third one, inflorescence necrosis (INec), is a disorder that should be in...
Resource Type:: Masters Thesis
Full Text:: Ammonium Detoxification 18 Fruit Set in Grape Vines 20 Regulation of Fruit Set 21 Means of

OSU Wine and Grape Research and Extension Newsletter : January 2009

Creator:: Oregon State University. Extension Service
Resource Type:: Other
Full Text:: thresholds for pests and diseases and selecting appropriate chemicals for control of disease and pest

OSU Wine and Grape Research and Extension Newsletter : July 2007

Creator:: Oregon State University. Extension Service
Abstract:: The growing season is in full swing. As growers are busy doing canopy management in the vineyards and wine makers are preparing for the upcoming vintage, OSU faculty are working hard on their field research trials and extension programs to advance viticulture and enology research and education. We’ve been busy...
Resource Type:: Other
Full Text:: to the world of winegrapes when a small wine shop opened in his hometown of Baker City, OR. Cook

Using rootstocks to manipulate vine physiological performance and mediate changes in fruit and wine composition

Creator:: Sampaio, Tiago Luís Barros
Abstract:: A rootstock trial was established in 1997 at the OSU Woodhall vineyard, located in the Southern Willamette Valley, which included two experiments. The first experiment was a factorial of four varieties grafted on to 9 rootstocks, and also as ungrafted vines (a split-plot design). The second experiment was a randomized...
Resource Type:: Dissertation
Full Text:: . The wine phenolic profile did not entirely reflect fruit composition, since extraction of skin

OSU Wine and Grape Research and Extension Newsletter : July 2009

Creator:: Oregon State University. Extension Service
Resource Type:: Other
Full Text:: mealybug or more insect pests of concern in Oregon may be due to the grape quarantine that is already

Determining the Impacts of Dormant Pruning Methods and Nitrogen Fertilization on Vitis vinifera 'Pinot noir' Bud Fruitfulness and Yield

Creator:: Ulmer, Miranda R.
Abstract:: The majority of grapes grown in Oregon are produced in Western Oregon’s Willamette Valley, where two-thirds of the acreage is planted to Pinot noir. The production of Pinot noir in the Willamette Valley comes at a high cost, and growers are seeking ways to increase profits while maintaining quality fruit...
Resource Type:: Masters Thesis
Full Text:: and nitrogen on fruit-set, ovule fertility, and fruit composition of several wine grape cultivars

Some Viticultural Limitations in some of Oregon Viticulture: An Integrated Approach to their Local Identification and Viticulture Management Responses to Them

Creator:: Shaulis, Nelson J.
Abstract:: This presentation and the 1986 visit to Oregon were by invitation from Oregon State University and the Wine Advisory Board, and supported by the Sokol Foundation. The ideal cooperation of Professor Porter Lombard and Mr. Steve Price is most gratefully acknowledged. We were in a learning experience, and humble in...
Resource Type:: Technical Report
Full Text:: fruit set problems; or at veraison for a broad examination of the soil-canopy-grape complex. The

Rootstock effect on the Vitis vinifera cultivars Chardonnay, Merlot, Pinot gris and Pinot noir during establishment

Creator:: McAuley, Michael D.
Abstract:: Winegrape growing is extremely dependent upon site-specific variables. To better understand the effect of rootstock-scion interaction in a cool climate region, an experimental vineyard was planted in 1997 at the Oregon State University Woodhall III property in the southern Willamette Valley. The first experiment consists of Pinot noir (clone FPMS...
Resource Type:: Masters Thesis
Full Text:: decision of rootstock choice in a wine grape vineyard, the most overwhelming pressure for rootstock use

Ammonium in grapevines : seasonal levels in tissue and xylem extracts, and a tendril model system

Creator:: Jordan, David T.
Resource Type:: Dissertation
Full Text:: importance of the grape crop also mean that it is one of the most researched fruit crops grown. Even

Chemical suppression of a perennial ryegrass (Lolium perenne) living mulch and influence of ground cover management on growth of 'Chardonnay' wine grapes (Vitis vinifera) and Douglas fir Christmas trees (Pseudotsuga menziesii)

Creator:: Brenner, Loretta K.
Resource Type:: Masters Thesis
Full Text:: weight of mowed and chemically suppressed perennial ryegrass in a wine grape planting 87 7. Clipping

Vineyard Notes : September 2010

Creator:: Oregon State University. Extension Service
Abstract:: Welcome to the September 2010 edition of OSU Vineyard Notes. We take this opportunity to make you aware of pest-related problems in the vineyard. This 2010 season has been a challenge for many, and the challenges do not stop here. Jay Pscheidt, OSU Extension Plant Pathology Specialist, reports on new...
Resource Type:: Other
Full Text:: of Agriculture (ODA) Grape Quarantine. If you suspect that you may have either of these pests

Water use of cool season grasses and their effect on grapevine (Vitis vinifera) growth and development

Creator:: Doty, Jean A.
Abstract:: The use of grass cover crops is a recommended practice in nonirrigated vineyards in the Willamette Valley, Oregon. Two studies were initiated to investigate the competitive and noncompetitive effects of grass cover crops on the growth and development of Pinot noir grapevines. Two greenhouse pot culture experiments were performed to...
Resource Type:: Masters Thesis
Full Text:: vines, 1987. 3.5 Grape petiole analysis of Pinot noir grape- 43 vines grown with various grass

Evaluation of grapevine red blotch virus epidemiology with reference to potential insect vectors

Creator:: Dalton, Daniel T.
Abstract:: Grapevine red blotch virus (GRBV), the causal agent of red blotch disease (RBD) in grapevine, Vitis vinifera L., is an emerging pathogen of significance to the wine grape industry of Oregon, USA. To address knowledge gaps of GRBV epidemiology, spread of GRBV was evaluated in Oregon vineyards over four years....
Resource Type:: Dissertation
Full Text:: grapevine, Vitis vinifera L., is an emerging pathogen of significance to the wine grape industry of Oregon

Facilitating plant-parasitic nematode management decisions for Washington Vitis vinifera growers : determining the spatial distribution of plant-parasitic nematodes and the host status of Vitis spp. to Meloidogyne hapla

Creator:: Howland, Amanda D.
Abstract:: A major constraint to the production of self-rooted wine grapes (Vitis vinifera) in eastern Washington is plant-parasitic nematodes. Plant-parasitic nematodes can impact grape productivity by limiting water and nutrient uptake, educing physiological changes, and extracting plant nutrients from roots, thereby reducing root biomass, plant vigor, and yield. The most commonly...
Resource Type:: Masters Thesis
Full Text:: : Introduction ………………………………………………...….…....... 2 1.1 Overview of the Washington grape industry

Effects of cover crop and vineyard floor management on young vine growth, soil moisture, and weeds in an establishing vineyard in the Willamette Valley of Oregon

Creator:: Fredrikson, Levi
Abstract:: Five vineyard floor management treatments were evaluated in a young vineyard in western Oregon to better understand the effects on vine growth and nutrition, soil moisture dynamics, and weed control during 2009 and 2010. Treatments included two mulched treatments where mowed alleyway residue was transferred in-row at rates of 1x...
Resource Type:: Masters Thesis
Full Text:: covers on berry and must characteristics of Sangiovese wine grape in the Brunello di Montalcino area

The Impact of Temperature on Halyomorpha halys (Hemiptera: Pentatomidae) Life Table Parameters and Feeding Pressure

Creator:: Maslen, Erika A.
Abstract:: Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) is an invasive insect pest that has become established and problematic in the Pacific Northwest. Known colloquially as the brown marmorated stink bug (BMSB), H. halys causes direct damage through feeding activity on a wide range of agronomic and horticultural crops. The objectives of this...
Resource Type:: Masters Thesis
Full Text:: Oregon and California Wine Grape Production…………………………………………...7 Potential Threat of Halyomorpha halys

Vineyard Notes : September 2011

Creator:: Oregon State University. Extension Service
Abstract:: This issue of Vineyard Notes covers four timely topics to be considered in your véraison vineyard management plans: + Bird control + Powdery mildew management + Late season Botrytis prevention + Tissue nutrient sampling
Resource Type:: Other
Full Text:: read the 2011 Pest Management Guide for Wine Grapes in Oregon. Disclaimer: Mention of a trademark

Using Vineyard Floor Management to Manipulate Vine Vigor: Impacts on 'Pinot noir' Yield Productivity and Fruit Composition

Creator:: Reeve, Alison L.
Abstract:: Winegrapes are an important crop for Oregon agriculture, ranking amongst the top ten agricultural commodities based on farmgate value. The most widely planted winegrape cultivar in the state is ‘Pinot noir’ (Vitis vinifera L.), and the majority of acreage is produced in the Willamette Valley. Production of quality ‘Pinot noir’...
Resource Type:: Dissertation
Full Text:: AND FRUIT COMPOSITION 2 CHAPTER 1 INTRODUCTION Wine grapes are one of

Marking, movement, and management of Drosophila suzukii in Oregon berry crops

Creator:: Klick, Jimmy
Abstract:: Drosophila suzukii Matsumura (Diptera: Drosophilidae) are small invasive flies that in the past five years (2009-2014) invaded berry and stone fruit production regions in Europe and the Americas. Evolutionary adaptations, biological traits, and anthropogenic factors have contributed to its current status as a global pest. Females oviposit eggs into ripe...
Resource Type:: Dissertation
Full Text:: contributed to its current status as a global pest. Females oviposit eggs into ripe fruit. Eggs develop into

The Role of Diurnal Light, Temperature, and Forced Egg Retention on Spotted Wing Drosophila, Drosophila suzukii Matsumura (Diptera: Drosophilidae) Survival and Ovipositional Rates

Creator:: York, Riki M.
Abstract:: Drosophila suzukii (Diptera: Drosophilidae) is a devastating pest that attacks thin-skinned stone and small fruit in all major production regions of the United States and worldwide. D. suzukii first appeared in the United States in 2008 and is believed to be native to Southeast Asia. This vinegar fly has a...
Resource Type:: Masters Thesis
Full Text:: suzukii (Diptera: Drosophilidae) is a devastating pest that attacks thin-skinned stone and small fruit

Development of a Multiplex PCR for Identification of Vineyard Mealybugs

Creator:: Daane, Kent M., Middleton, Mathew C., Sforza, Rene, Cooper, Monica L., Walton, Vaughn M., Walsh, Douglas B., Zaviezo, Tania, and Almeida, Rodrigo P. P.
Abstract:: A simple molecular tool was developed and tested to identify seven mealybug species found in North American vineyards: Pseudococcus maritimus Ehrhorn, Pseudococcus viburni (Signoret), Pseudococcus longispinus (Targioni-Tozzeti), Pseudococcus calceolariae (Maskell), Planococcus fleas (Signoret), Planococcus citri (Risso), and Ferrisia gilli Gullan. The developed multiplex PCR is based on the mitochondrial cytochrome...
Resource Type:: Article
Full Text:: (Charles 1982, Ben-Dov 1995). In most of the worldÕs wine grape regions, however, it is not the damage from

Disease resistance and spring phenological characteristics of Ribes L. germplasm

Creator:: Dalton, Daniel T.
Abstract:: North American cultivation of Ribes L. may expand as small fruit growers seek species to diversify horticultural crops. The Ribes industry was suppressed for decades out of fear that cultivated black currants and gooseberries would intensify the fungal disease white pine blister rust (WPBR) on five-needle pine (Pinus L. section...
Resource Type:: Masters Thesis
Full Text:: : __________________________________________________ Kim E. Hummer North American cultivation of Ribes L. may expand as small fruit growers

Evaluation of methyl salicylate lures on populations of Typhlodromus pyri (Acari: Phytoseiidae) and other natural enemies in western Oregon vineyards

Creator:: Gadino, Angela N., Walton, Vaughn M., and Lee, Jana C.
Abstract:: Methyl salicylate (MeSA), a herbivore-induced plant volatile, can elicit control of pests through attraction of beneficial arthropods. This study evaluates the effect of synthetic MeSA lures (PredaLure) on arthropod populations during the 2009 and 2010 seasons in two Oregon vineyards (Dayton and Salem). MeSA lures were deployed at a low...
Resource Type:: Article
Full Text:: plant volatile, can elicit control of pests through attraction of beneficial arthropods. This study

Comparison of baits for monitoring the spotted wing Drosophila, Drosophila suzukii

Creator:: Kleiber, Joseph R.
Abstract:: Spotted wing Drosophila (SWD), Drosophila suzukii (Diptera: Drosophilidae), is a pest of small and stone fruits that is widely distributed across much of the United States, Canada, Europe and Asia. Unlike other members of the Drosophilidae that only lay eggs in overripe or rotting fruit, SWD infest ripening and ripe...
Resource Type:: Masters Thesis
Full Text:: Drosophila genus, the only other species known to oviposit in intact fruit is D. pulchrella, a pest of tree

Impact of floral feeding on adult Drosophila suzukii survival and nutrient status

Creator:: Tochen, Samantha, Walton, Vaughn M., and Lee, Jana C.
Abstract:: Drosophila suzukii, spotted wing drosophila, is a serious pest of small fruits and cherries in many regions of the world. While host usage has been well studied at the ovipositional and larval feeding stages, little is known about the feeding ecology and nutrient requirements of adults. This study addressed the...
Resource Type:: Article
Full Text:: Berlin Heidelberg 2016 Abstract Drosophila suzukii, spotted wing drosophila, is a serious pest of small

Biotic and abiotic factors impacting development, behavior, phenology, and reproductive biology of Drosophila suzukii

Creator:: Hamby, Kelly A., Bellamy, David E., Chiu, Joanna C., Lee, Jana C., Walton, Vaughn M., Wiman, Nik G., York, Riki M., and Biondi, Antonio
Abstract:: Spotted wing drosophila, Drosophila suzukii, is a devastating invasive pest of small and stone fruits in the Americas and Europe. To better understand the population dynamics of D. suzukii, we reviewed recent work on juvenile development, adult reproduction, and seasonal variation in life history parameters including the abiotic/biotic factors that...
Resource Type:: Article
Full Text:: wing drosophila, Drosophila suzukii, is a devastating invasive pest of small and stone fruits in the

Microsatellite Marker Development, Characterization and Mapping in European Hazelnut (Corylus avellana L.), and Investigation of Novel Sources of Eastern Filbert Blight Resistance in Corylus

Creator:: Bhattarai, Gehendra
Abstract:: European hazelnut, an important nut crop in Oregon agriculture, is threatened by the fungal disease eastern filbert blight (EFB) caused by Anisogramma anomala (Peck) E. Müller. The hazelnut breeding program at OSU has been working on development of EFB-resistant cultivars. DNA markers allow mapping of traits using segregating progenies and...
Resource Type:: Masters Thesis
Full Text:: Mapping in European Hazelnut (Corylus avellana L.), and Investigation of Novel Sources of Eastern Filbert

Horticultural weed control : 1988 report

Creator:: Oregon State University. Department of Horticulture
Abstract:: Crops were grown at the experimental farms using accepted cultural practices within the limits of experimentation trials were conducted on growers' fields. Most experiments were designed as randomized complete blocks with two to five replications. Herbicide treatments were applied uniformly with precision plot sprayers or granular formulations were distributed from...
Resource Type:: Technical Report
Full Text:: . . . . . . . . . . . . . . Effects of living mulch on growth of wine grape 'Pinot noir' and vineyard soil moisture condition

Horticultural weed control : 1986-87 report

Creator:: Oregon State University. Department of Horticulture
Abstract:: Crops were grown at the experimental farms using accepted cultural practices within the limits of experimentation or trials were conducted on growers' field. Most experiments were designed as randomized complete blocks with two to five replications, Herbicide treatments were applied uniformly with equipment ranging from precision plot sprayers to quart...
Resource Type:: Technical Report
Full Text:: •• , , • , •••• , , •••••• , , •••• , , , •••• , ••••••• , ••• e ••• , , •••• , , Small Fruit - Summary .......................................... . Devrinol

Behavior of Drosophila suzukii in Relation to Abiotic, Biotic, and Nutrient Factors

Creator:: Park, Kyoo Rok
Abstract:: Drosophila suzukii (Diptera: Drosophilidae), is a serious pest in soft and stone fruit industries worldwide. The unique serrated ovipositor of female Drosophila suzukii allowed the species to reproduce in intact, ripening fruit before the harvest. Current control methods rely heavily on insecticide application, only becoming less profitable due to the...
Resource Type:: Dissertation
Full Text:: stone fruit industries worldwide. The unique serrated ovipositor of female Drosophila suzukii

Habitat management for beneficial insects on Willamette Valley vegetable and berry farms

Creator:: Russell, Michael C.
Abstract:: Conservation biological control involves manipulating farm landscapes or management systems to enhance populations of beneficial predators of agricultural pests. Farmscaping is one aspect of conservation biological control where predators of important pests are identified, the availability on the farm landscape of resources and habitat components needed by the beneficials to...
Resource Type:: Dissertation
Full Text:: management systems to enhance populations of beneficial predators of agricultural pests. Farmscaping is one

Influence of abiotic and biotic factors on developmental parameters of Drosophila suzukii (Diptera: Drosophilidae)

Creator:: Tochen, Samantha
Abstract:: Drosophila suzukii (Diptera: Drosophilidae), a pest of thin-skinned fruits, has been detected worldwide recently, with new locations of establishment determined annually since it first became a concern on continental North America in 2008. Drosophila suzukii females are different from most other drosophilids as being one of two known species capable...
Resource Type:: Masters Thesis
Full Text:: mixtures of different fruit wines, rice wine, molasses, and acetic acid. A rice wine and honey solution

Evaluating Alternative Soil Amendments for Organic Northern Highbush Blueberry Cultivation in Sub-Optimal Soils

Creator:: Retano, Andrea
Abstract:: Escalating demand for organic blueberries has driven a significant expansion of northern highbush blueberry (NHB; Vaccinium corymbosum L.) production area. This expansion is particularly pronounced in regions of the Pacific Northwest where native soil conditions are sub-optimal for NHB, notably east of the Cascade Mountain Range of Oregon and Washington,...
Resource Type:: Masters Thesis
Full Text:: as potential soil amendments to support NHB plant growth. This region's ubiquitous wine grape

The effects of kernel feeding by brown marmorated stink bug (Halyomorpha halys: Hemiptera: Pentatomidae) on commercial hazelnuts (Corylus avellana L.)

Creator:: Hedstrom, Christopher S.
Abstract:: Halyomorpha halys (brown marmorated stink bug, Hemiptera: Pentatomidae), an invasive insect pest, has established populations in the Willamette Valley of Oregon. Halyomorpha halys is a potential pest of many specialty crops in the Willamette Valley, including hazelnuts (Corylus avellana L.). The objectives of this study were to 1) characterize the...
Resource Type:: Masters Thesis
Full Text:: Willamette Valley of Oregon. Halyomorpha halys is a potential pest of many specialty crops in the

Development and use of molecular tools in Fragaria

Creator:: Njuguna, Wambui
Abstract:: This dissertation describes the application and development of molecular tools that have great potential for use in studying variation in strawberry germplasm. The first study evaluated 91 microsatellite (simple sequence repeat, SSR) markers for transferability in 22 Fragaria species and their utility in fingerprinting octoploid strawberries. Out of the transferable...
Resource Type:: Dissertation
Full Text:: feature used to distinguish the two species. The fruit of F. viridis has wine red skin while the cortex

Evaluation of botanical diversity in Oregon vineyards

Creator:: Schonenberger, Patrik M.
Abstract:: Three different ground cover management strategies were compared at the OSU research vineyard near Alpine, Oregon. Botanical diversity was actively increased in two diverse treatments. Another treatment was botanically uniform and contained creeping bentgrass (Agrostis stolonifera). The composition of the vineyard floor vegetation and grapevine performance as affected by the...
Resource Type:: Masters Thesis
Full Text:: treatments, and in one of the two investigated years, fruit yield was also higher. Percent fruit set

Suitability of diverse composts as soil amendments for highbush blueberry (Vaccinium corymbosum L.)

Creator:: Costello, Ryan C.
Abstract:: Highbush blueberry (Vaccinium corymbosum L.) is adapted to soils with high organic matter and acidic pH. Composts provide organic matter and nutrients for growing blueberry in mineral soils, but many composts are high in pH and soluble salts. Acidification with elemental sulfur (S°) can remedy high pH, but the process...
Resource Type:: Masters Thesis
Full Text:: incorporating high amounts of agricultural waste compost significantly increased plant growth and fruit size

Suppression of Microdochium Patch on Annual Bluegrass Putting Greens using Iron Sulfate, Phosphorous Acid, Sulfur, and Mineral Oil

Creator:: Mattox, Clint M.
Abstract:: Managing Microdochium patch on intensively manicured annual bluegrass putting greens is a challenge for turfgrass professionals in cool-humid climates similar to the Pacific Northwest. Fungicides are the predominant means to mitigate damage caused by this fungal pathogen, however pesticide restrictions are making it even more challenging to suppress Microdochium patch....
Resource Type:: Dissertation
Full Text:: that future research is warranted in using these techniques as a part of an integrated pest

Influence of cover crops on vine performance at two Willamette Valley vineyards

Creator:: Sweet, Rebecca Marie
Abstract:: It is estimated that 50-75% of Oregon vineyards cultivate at least every other alley in order to 1) reduce water stress 2) increase vineyard canopy temperatures and 3) increase nutrient availability. Because many vineyards are situated on steep hillsides, frequent tillage could result in increased soil erosion, decreased soil quality...
Resource Type:: Masters Thesis
Full Text:: infrequent use or availability of irrigation in this region distinguishes it from other wine grape growing

Development of genetic resources for Rubus occidentalis from three segregating sources of resistance to Aphid Amphorophora agathonica

Creator:: Mulch, Christina M.
Abstract:: Black raspberry (Rubus occidentalis L.) is a US Pacific Northwest specialty crop prized for its unique flavor profile and nutritional attributes. A major obstacle for the raspberry industry is Black raspberry necrosis virus vectored by the large raspberry aphid (Amphorophora agathonica). Market expansion depends on production, which is currently hindered...
Resource Type:: Masters Thesis
Full Text:: Rosaceae, which includes several of the earliest fruit crops to be cultivated by humans as well as some

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