X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Management of Grape Powdery Mildew with an Intelligent Sprayer and Sulfur
    Scientific Societies ; 2022
    In:  Plant Disease Vol. 106, No. 7 ( 2022-07-01), p. 1837-1844
    Details
    In: Plant Disease, Scientific Societies, Vol. 106, No. 7 ( 2022-07-01), p. 1837-1844
    Abstract: Wine grapes are an important agricultural commodity in the Pacific Northwest, where grape powdery mildew (GPM) is one of the main disease problems. The efficacy of various sulfur concentrations and output volumes from an air blast sprayer retrofitted with the Intelligent Spray System (ISS) were evaluated for the management of GPM. The ISS consists of a LiDAR sensor, Doppler speed sensor, embedded computer, flow controller, and individual pulse-width-modulation solenoid valves at each nozzle. GPM cluster severity ranged from 55 to 75% across all trials in the study when the ISS was used at its default spray rate of 62.5 ml/m 3 with micronized sulfur at 6 g/liter, which was significantly higher than all other fungicide treatments but lower than nontreated controls. Similarly, leaf incidence values were highest on nontreated vines, followed by micronized sulfur at 6 g/liter applied at 62.5 ml/m 3 , with all other fungicide treatments being significantly lower in all trials. Using the ISS at the 62.5 ml/m 3 rate and a rotation of locally systemic fungicides resulted in the lowest observed GPM leaf incidence and average cluster severity of 11% in both 2019 and 2020, the lowest cluster severity of all fungicide treatments tested. GPM control with the ISS and micronized sulfur was equivalent to a constant-rate air blast treatment at 6 g/liter when the spray rate of the ISS was increased to 125 ml/m 3 or the concentration of sulfur was increased to 24 g/liter. In those cases, the amount of sulfur applied to vines was at or above the minimum label rate from bloom until the end of the season, or the entire season, respectively. This study has shown that sufficient disease control cannot always be expected when pesticides are mixed at the same rate as would be used for a constant-rate sprayer in a variable rate sprayer, especially when contact fungicides such as sulfur are used. With appropriate adjustments, the variable-rate ISS can be a useful tool to reduce pesticide quantities, water needed for mixing, and as a result labor, because fewer trips to refill for a given spray event are needed.
    Type of Medium: Online Resource
    ISSN: 0191-2917 , 1943-7692
    URL: Article
    DOI: 10.1094/PDIS-06-21-1164-RE
    Language: English
    Publisher: Scientific Societies
    Publication Date: 2022
    detail.hit.zdb_id: 2042679-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 2
    Online Resource
    Online Resource
    Rapid Evaluation of Pathogenicity in Pseudomonas syringae pv. syringae with a Lilac Tissue Culture Bioassay and Syringomycin DNA Probes
    Scientific Societies ; 1997
    In:  Plant Disease Vol. 81, No. 8 ( 1997-08), p. 905-910
    Details
    In: Plant Disease, Scientific Societies, Vol. 81, No. 8 ( 1997-08), p. 905-910
    Abstract: Losses from diseases caused by Pseudomonas syringae pv. syringae occur on a large number of deciduous woody plants in commercial nurseries in the Pacific Northwest. Bioassays for pathogenicity are one step in the identification of P. syringae pv. syringae and are usually performed on the host of isolation; however, woody plants can take months to develop symptoms. A bioassay with highly susceptible lilac (Syringa vulgaris ‘Sensation’) tissue culture plantlets evaluated pathogenicity in strains of P. syringae pv. syringae isolated from 25 species of deciduous woody plants. DNA colony hybridization with the syrB probe for a syringomycin synthetase gene and the syrD probe for a syringomycin export gene was also evaluated as a method for identifying pathogens. Of 552 strains provisionally identified as P. syringae pv. syringae, 59% were pathogenic in the bioassay and hybridized with the syr probes, while 19% were non-pathogenic and did not hybridize with the syr probes, giving 78% agreement between the two methods. Nine percent of strains were pathogenic in the bioassay but did not hybridize with the syr probes, and 13% were not pathogenic in the bioassay but did hybridize with the syr probes. These methods detected pathogenic strains of P. syringae pv. syringae isolated from diverse woody plants in 5 to 16 days.
    Type of Medium: Online Resource
    ISSN: 0191-2917 , 1943-7692
    URL: Article
    DOI: 10.1094/PDIS.1997.81.8.905
    Language: English
    Publisher: Scientific Societies
    Publication Date: 1997
    detail.hit.zdb_id: 2042679-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 3
    Online Resource
    Online Resource
    Canopy spray application technology in specialty crops: a slowly evolving landscape
    Wiley ; 2021
    In:  Pest Management Science Vol. 77, No. 5 ( 2021-05), p. 2157-2164
    Details
    In: Pest Management Science, Wiley, Vol. 77, No. 5 ( 2021-05), p. 2157-2164
    Abstract: Many specialty crops are susceptible to insects and diseases, and as such are reliant on regular canopy pesticide applications to achieve quality attributes required for salability. The majority of specialty crop producers continue to use antiquated pesticide application technologies for directed canopy spraying such as the radial air blast sprayer that has been associated with chemical wastage and off‐target drift of around 40% and 15% of total applied spray volume, respectively. However, precision sprayers are available that result in remarkable improvements to these parameters. The wide‐scale adoption of precision sprayers by specialty crop producers remains low. Reasons for the continued dominance of old technologies include risk averseness of farmers and regulatory bottlenecks. However, as farm labor becomes more expensive, less available, and consumers and regulations favor sustainably produced products, motivations to improve spray application efficiency are increasing. While there are many opportunities and future directions application technology may take, sensor‐controlled sprayer technology that applies a proportionate amount of spray will likely be the primary technology of precision sprayers going into the future. © 2020 Society of Chemical Industry
    Type of Medium: Online Resource
    ISSN: 1526-498X , 1526-4998
    URL: Issue
    URL: Article
    DOI: 10.1002/ps.v77.5
    DOI: 10.1002/ps.6167
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2003455-6
    SSG: 12
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 4
    Online Resource
    Online Resource
    Rolling and Biological Control Products Affect Microdochium Patch Severity on a Sand‐Based Annual Bluegrass Putting Green
    Wiley ; 2018
    In:  Agronomy Journal Vol. 110, No. 6 ( 2018-11), p. 2124-2129
    Details
    In: Agronomy Journal, Wiley, Vol. 110, No. 6 ( 2018-11), p. 2124-2129
    Abstract: There is evidence that rolling an annual bluegrass putting green 5 d a wk −1 resulted in a lower severity of Microdochium patch. Two biological control products were shown to significantly lower Microdochium patch severity. Neither biological products nor rolling were shown to completely suppress Microdochium patch; therefore, turfgrass quality was not considered acceptable for any treatments. This study offers evidence of alternative disease control techniques for the management of Microdochium patch on annual bluegrass putting greens. The turfgrass disease Microdochium patch caused by the pathogen Microdochium nivale (Fries) Samuels & I.C. Hallett occurs in cool, humid regions. Fungicide applications are the predominant control method, however increasing pesticide restrictions have generated concern regarding their use. The objective of this research was to evaluate the effects of rolling 5 d wk −1 in combination with three biological control products applied every 2 wk on Microdochium patch severity on an annual bluegrass ( Poa annua L.) putting green in the absence of traditional fungicides. Biological control products included; BW136N ( Trichoderma harzianum Rifai strain T‐22 + Trichoderma virens (J.H. Mill. Giddens & A.A. Foster) Arx strain G‐41), Rhapsody ( Bacillus subtilis strain QST 713), and Provide (a microbial solution containing unspecified strains of Bacillus subtilis , Mucor hiemalis , and Trichoderma harzianum ) + ReVive (7% humic acid derived from Leonardite). Rolling was effective at inhibiting Microdochium patch as measured by area under disease progress curves (AUDPC) in both years on rolled plots compared to not rolled plots by 47 and 75%, respectively. Applications of BW136N and Rhapsody reduced the severity of Microdochium patch as measured by AUDPC compared to the control (66 and 50% reduction, respectively). The ProVide + ReVive combination did not suppress disease in this study. At the peak of disease, turfgrass quality was greatest when rolling was combined with applications of BW136N or Rhapsody. These findings suggest that rolling as well as BW136N or Rhapsody can inhibit Microdochium patch severity and further research into this management method is warranted.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Article
    DOI: 10.2134/agronj2018.01.0008
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1471598-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 5
    Online Resource
    Online Resource
    Nitrogen and Iron Sulfate Affect Microdochium Patch Severity and Turf Quality on Annual Bluegrass Putting Greens
    Wiley ; 2017
    In:  Crop Science Vol. 57, No. S1 ( 2017-07)
    Details
    In: Crop Science, Wiley, Vol. 57, No. S1 ( 2017-07)
    Abstract: Microdochium patch is an important turfgrass disease in cool‐humid regions and is caused by the pathogen Microdochium nivale (Fries) Samuels & Hallett. Control of the pathogen is necessary to provide acceptable putting‐green‐quality turf, and fungicide applications are the predominant method of control. Increasing pesticide restrictions have generated interest in alternative management techniques of Microdochium patch. This research evaluated the effects of three nitrogen and five iron sulfate rates on Microdochium patch development on a trafficked, sand‐based, annual bluegrass ( Poa annua L.) putting green in Corvallis, OR for over 2 yr in the absence of fungicides. Data included turf quality, area under disease progress curve, and soil test results of saturated paste extract pH, cation extractable sulfate, and DTPA‐sorbitol extractable iron. This research provided evidence that low rates of urea (4.88 kg N ha −1 ) applied every 2 wk did not lead to an increase in Microdochium patch severity and that iron sulfate applications decreased Microdochium patch on annual bluegrass putting greens. Despite the disease suppression observed, no treatment received a turf‐quality rating considered acceptable. Low turf‐quality ratings where disease development was low were attributed to turfgrass thinning or blackening of the shoots resulting from iron sulfate applications. Soil tests provided evidence that the highest iron sulfate level used in this study (97.65 kg ha −1 ) applied every 2 wk would likely lead to a lower soil pH and an increase in soil sulfate levels.
    Type of Medium: Online Resource
    ISSN: 0011-183X , 1435-0653
    URL: Article
    DOI: 10.2135/cropsci2016.02.0123
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 1480918-7
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 6
    Online Resource
    Online Resource
    Combinations of rolling, mineral oil, sulfur, and phosphorous acid affect Microdochium patch severity
    Wiley ; 2020
    In:  Agronomy Journal Vol. 112, No. 5 ( 2020-09), p. 3383-3395
    Details
    In: Agronomy Journal, Wiley, Vol. 112, No. 5 ( 2020-09), p. 3383-3395
    Abstract: Microdochium patch is a turfgrass disease that occurs in cool, humid regions caused by the fungal pathogen Microdochium nivale (Fr.) Samuels & Hallett [Teleomorph =  Monographella nivalis (Schaffnit) E. Müll]. Fungicide applications are the predominant method of control; however, pesticide restrictions have generated concern regarding the use of traditional chemicals to manage turfgrass pests. The objective of this research was to evaluate the effects of the cultural practice of rolling in combination with applications of mineral oil, S, and/or phosphorous acid (H 3 PO 3 ) on the suppression of Microdochium patch on an annual bluegrass ( Poa annua L.) putting green. A 2‐yr field trial took place from September 2013 to June 2014 and was repeated from September 2014 to June 2015 on a sand‐based annual bluegrass putting green in Corvallis, OR. Experimental design was a 2 × 4 × 2 × 2 randomized complete split‐plot design with four replications. Factors included rolling, the fertility products S and H 3 PO 3 applied alone and in combination, mineral oil treatment, and year. Mineral oil suppressed Microdochium patch although applications led to turfgrass thinning. The combination of S and H 3 PO 3 provided greater Microdochium patch disease suppression compared to applying either alone. Rolling also suppressed Microdochium patch in the second year of this study. Further research to determine how to best utilize these combined cultural practices to manage Microdochium patch is warranted.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Issue
    URL: Article
    DOI: 10.1002/agj2.v112.5
    DOI: 10.1002/agj2.20191
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1471598-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 7
    Online Resource
    Online Resource
    Can a LiDAR-enhanced Air-blast Sprayer Improve Coverage on Tough Targets like Tree Trunks and Emerging Shoots?
    American Society for Horticultural Science ; 2024
    In:  HortTechnology Vol. 34, No. 6 ( 2024-12), p. 677-686
    Details
    In: HortTechnology, American Society for Horticultural Science, Vol. 34, No. 6 ( 2024-12), p. 677-686
    Abstract: Eastern filbert blight (EFB) and pacific flatheaded borer (PFB) are two problems of Pacific Northwest orchard and nursery production. Fungicides and insecticides used to manage these issues are typically applied to plant tissues with minimal foliage present that can result in considerable spray waste or drift. The Intelligent Spray System (ISS) is a laser-guided, variable-rate sprayer that detects objects in the target zone and releases spray volumes proportional to the density of plant tissues, thereby increasing application efficiency and reducing waste. However, the ISS has not been tested when targeting low-foliage plant tissues such as emerging shoots and trunks. Three experiments were conducted from 2018 to 2021 to evaluate the potential use of the ISS for EFB and PFB management by assessing spray coverage on emerging hazelnut shoot tips, hazelnut tree trunks, and maple tree trunks. On hazelnut shoot tips, coverage was 〈 10% of the shoot on both adaxial and abaxial sides, with the highest coverage on the adaxial side (9.5%) resulting from spraying in standard mode (no sensors) at 3.1 kph. On hazelnut trunks, application at the slowest tested speed (3.1 kph) in intelligent mode resulted in spray coverage greater than or equal to that applied in standard mode at 5.1 kph. In addition, coverage was significantly higher on cards placed on the ground between trees when the sprayer was used in standard mode, indicating higher amounts of wasted spray and drift over intelligent mode. On maple trunks, the slowest speed tested (3.1 kph) resulted in the highest coverage of tree trunks facing the sprayer that were two and three rows away from the sprayer, with the highest coverage levels on the row of trees closest to the sprayer occurring at the highest tested speed of 6.4 kph. On cards placed on trunk sides not facing the sprayer, the slowest tested speed of 3.2 kph resulted in significantly higher coverage than both treatments at 6.4 kph and intelligent mode at 4.8 kph in the tree row closest to the sprayer. This work has demonstrated a baseline of coverage that hazelnut buds receive when spraying for EFB, illustrates that the ISS was able to effectively target trunks, and could be an alternative to drenches for PFB control.
    Type of Medium: Online Resource
    ISSN: 1063-0198 , 1943-7714
    URL: Article
    DOI: 10.21273/HORTTECH05494-24
    Language: Unknown
    Publisher: American Society for Horticultural Science
    Publication Date: 2024
    detail.hit.zdb_id: 2038832-9
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 8
    Online Resource
    Online Resource
    Genetic differentiation and spatial structure of Geosmithia morbida, the causal agent of thousand cankers disease in black walnut (Juglans nigra)
    Springer Science and Business Media LLC ; 2014
    In:  Current Genetics Vol. 60, No. 2 ( 2014-5), p. 75-87
    Details
    In: Current Genetics, Springer Science and Business Media LLC, Vol. 60, No. 2 ( 2014-5), p. 75-87
    Type of Medium: Online Resource
    ISSN: 0172-8083 , 1432-0983
    URL: Article
    DOI: 10.1007/s00294-013-0414-x
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2014
    detail.hit.zdb_id: 1458984-9
    SSG: 12
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 9
    Online Resource
    Online Resource
    Progression of Symptoms on Blueberry Infected with Blueberry shock virus
    Scientific Societies ; 2014
    In:  Plant Health Progress Vol. 15, No. 2 ( 2014-01), p. 78-79
    Details
    In: Plant Health Progress, Scientific Societies, Vol. 15, No. 2 ( 2014-01), p. 78-79
    Abstract: This study was initiated to give growers a better perspective on symptom progression in a susceptible blueberry field after Blueberry shock virus is first detected.
    Type of Medium: Online Resource
    ISSN: 1535-1025
    URL: Article
    DOI: 10.1094/PHP-RS-13-0121
    Language: English
    Publisher: Scientific Societies
    Publication Date: 2014
    detail.hit.zdb_id: 2115009-6
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
  • 10
    Online Resource
    Online Resource
    Boxwood Blight Disease: A Diagnostic Guide
    Scientific Societies ; 2020
    In:  Plant Health Progress Vol. 21, No. 4 ( 2020-01-01), p. 291-300
    Details
    In: Plant Health Progress, Scientific Societies, Vol. 21, No. 4 ( 2020-01-01), p. 291-300
    Abstract: Boxwood blight, caused by Calonectria henricotiae and C. pseudonaviculata, is an extremely destructive disease of cultivated and native Buxus species (boxwood) worldwide. The disease is widespread in North America, Europe, and Southwest Asia. Early and accurate diagnosis of boxwood blight is the most effective tool used to prevent spread of the disease, and it is the first step for development and implementation of appropriate control measures. This diagnostic guide provides up-to-date information on how to diagnose and identify boxwood blight and also offers an overview of methods used to isolate the pathogen, store cultures, and evaluate pathogenicity of the causal agents.
    Type of Medium: Online Resource
    ISSN: 1535-1025
    URL: Article
    DOI: 10.1094/PHP-06-20-0053-DG
    Language: English
    Publisher: Scientific Societies
    Publication Date: 2020
    detail.hit.zdb_id: 2115009-6
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Online Resource
    Open Access Request
    Availability (electronic / print)
Nothing or not found what you are looking for? Please check your search query or use the Interlibrary Loan Search.
Close ⊗
This website uses cookies and the analysis tool Matomo. Further information can be found on the KOBV privacy pages