Revising the Aster Yellows Index and Management in Wisconsin

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Variance Component Analysis The objective of this analysis is to estimate variances not to detect differences Chapman was right!!! - Year describes 29% of variability of ALH infectivity- but there is room for improvement... •ALH Abundance (25%) - Day within year •ALH infectivity (26%) - Week within year Can we explain the variability within years
Detection of seasonal trends in AY ‘Risk Windows’ Modified from Nault et. al. (2009). Environ. Entomology. Our methods: Sweep data were averaged for each year, field, and date combination Data were standardized using either random effects models or regression splines Cubic polynomials were fit to the resulting “conditional” or “deseasonalized” data (linear model) Does seasonality describe any more of this variability
Page 1 and 2: Revising the Aster Yellows Index an
Page 3 and 4: Factors Influencing Insect Pest Man
Page 5 and 6: Presentation Outline Goal - Sustain
Page 7 and 8: Aster yellows phytoplasma (AYp), Ca
Page 9 and 10: Aster leafhopper migratory behavior
Page 11 and 12: Aster yellows management: controlli
Page 13 and 14: Presentation Outline Goal - Sustain
Page 15: Evaluating variability associated w
Page 19 and 20: Seasonal trends: ALH infectivity Us
Page 21 and 22: Concurrence of AY “risk windows
Page 23 and 24: Next Steps - 2011: Using informatio
Page 25 and 26: Reduced Risk In-Furrow and Seed Tre
Page 27 and 28: Novel, Reduced-Risk, Carrot Seed Tr
Page 29 and 30: Overall summary: refining the AYI A
Page 31: QUESTIONS

Revising the Aster Yellows Index and Management in Wisconsin

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