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Evaluation of airborne methyl salicylate for improved conservation biological control of two-spotted spider mite and hop aphid in Oregon hop yards
TLDR
It is suggested that CBC of hop aphid with MeSA in this environment may be unsatisfactory, and variations among farms in suppression of two-spotted spider mites and attraction of Stethorus spp.
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Association of Spring Pruning Practices with Severity of Powdery Mildew and Downy Mildew on Hop.
TLDR
It is emphasized that early spring sanitation measures are associated with reduced primary inoculum and are critically important for managing both downy mildew and powdery mildine.
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QTL analysis of resistance to powdery mildew in hop (Humulus lupulus L.)
TLDR
The SNP markers identified in this study still require validation in unrelated populations prior to implementation in breeding programs, suggesting quantitative genetic control.
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New Outbreaks of Verticillium Wilt on Hop in Oregon Caused by Nonlethal Verticillium albo-atrum
TLDR
Findings indicate that the recent outbreaks of V. albo-atrum on hop in Oregon were caused by nonlethal strains, which has key implications for devising management strategies on the affected farms.
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Crop damage caused by powdery mildew on hop and its relationship to late season management
TLDR
This is the publisher’s final pdf of the article and the article is in the public domain.
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Development of Partial Ontogenic Resistance to Powdery Mildew in Hop Cones and Its Management Implications
TLDR
It is established that partial ontogenic resistance develops in hop cones and may influence multiple phases of the infection process and pathogen reproduction and the concept that the efficacy of a fungicide program may depend largely on timing of a small number of sprays during a relatively brief period of cone development is reinforced.
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Development of Biological Control of Tetranychus urticae (Acari: Tetranychidae) and Phorodon humuli (Hemiptera: Aphididae) in Oregon Hop Yards
TLDR
Whereas total reliance on biological control for hop aphid is unlikely to be successful, there appears to be unrealized potential for biological control of spider mites in commercial production.
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Pre- and Postinfection Activity of Fungicides in Control of Hop Downy Mildew.
Optimum timing and use of fungicides for disease control are improved by an understanding of the characteristics of fungicide physical mode of action. Greenhouse and field experiments were conducted…
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Population Density and Phenology of Tetranychus urticae (Acari: Tetranychidae) in Hop is Linked to the Timing of Sulfur Applications
TLDR
Collectively, these studies indicate sulfur induces mite outbreaks through direct or indirect effects on T. urticae, mostly independent of predatory mite abundance or toxicity to these predators.
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Stability and Resiliency of Biological Control of the Twospotted Spider Mite (Acari:Tetranychidae) in Hop
TLDR
Quantified the stability and resiliency of established conservation biological control of the twospotted spider mite in hop over a 5-yr period associated with nitrogen fertilization rate and use of a broad-spectrum insecticide and found it appears stable and robust to factors that increase reproductive rates of spider mites but may be sensitive to factors such as nonselective insects that are lethal to natural enemies.
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