Epidemiology and Management of Hop Pests and Diseases

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Rate of Mite Increase andCone DamageTreatmentRate mite increase(mites/leaf/day)Lower(Non-treated with miticides)UpperCone damageMean Median RE cNontreated0.9961.1681.0410.50Synthetic0.9991.2001.0310.50Early sulfur1.0231.1841.0210.49Mid sulfur1.0051.1511.0310.50Late sulfur1.0021.2291.0510.50Pairwise comparison (α = 0.05) of rates during exponential phase; 100 cones were rated usingan ordinal scale; Nonparametric ANOVA-type statistic. Relative effect (RE) ranges from 0 to 1.
Red Crown Rot• Described in Australia as being caused byan undetermined Phacidiopycnis sp.• Yield loss estimates in Victoria of 10-50%• Yield decline is progressive; reported toappear as long as years 5 after planting
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Epidemiology andManagement of Hop P
Page 3 and 4:
Compendium of HopDiseases, Arthropo
Page 5 and 6:
Overall Project Objective• Integr
Page 7 and 8: • Johnson (1991) GDD predictsemer
Page 9 and 10: 160Accumulated GDD, 2006140120GDD (
Page 11 and 12: Downy Mildew Severity AmongBasal sp
Page 13: hopcucurbitPCR Detection of Downy M
Page 16 and 17: Multi-Gene Phylogeny• Several sin
Page 18 and 19: Type I versus Type II Error?
Page 20 and 21: Air sampling by Burkhard and Rotoro
Page 22 and 23: Pseudoperonospora humuli Sporangial
Page 24 and 25: Basal spikes per hillABasal spikes
Page 26 and 27: Fungicide Effects on Arthropods
Page 28 and 29: Spider mite populations in the uppe
Page 30 and 31: SulfurWater1234
Page 32 and 33: Mite-Fungicide Interactions• Ques
Page 34 and 35: 1210ANon-TreatedMites per leaf864Sy
Page 36 and 37: Coccinelidae per leaf/shake sample1
Page 38 and 39: Hop Aphid Populations inRelation to
Page 40 and 41: Thanks to collaboratorsand cooperat
Page 42 and 43: 1009080702007 WeatherRain Temp RH S
Page 44 and 45: Cone Browning Associated withDiffus
Page 46 and 47: Powdery Mildew Risk Index1. If grea
Page 48 and 49: 1009080702007 WeatherRain Temp RH S
Page 50 and 51: Alternaria alternataFrom Rotem (199
Page 52 and 53: Alternaria Cone Disorder• Associa
Page 54 and 55: Alternaria Cone Disorder2007 Isolat
Page 56 and 57: Powdery Mildew (and Alternaria)Cone
Page 60: Red Crown Rot SymptomsCourtesy Tris
Page 69: Red Crown Rot• Phacidiopycnis sp.
Page 72 and 73: Spatial Patterns of Affected Plants
Page 74: Red Crown Rot• Research in Progre
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Epidemiology and Management of Hop Pests and Diseases

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