Wisconsin CCA Training Weed Management - Integrated Pest and ...

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Palmer amaranth (Amaranthus palmeri) is in <strong>Wisconsin</strong> Crop Production Fields <strong>Wisconsin</strong> Crop Manager article 10/13/11
Of most concern in WI: Glyphosate-Resistant Giant Ragweed • Others in the running – Common ragweed – Lambsquarters – Waterhemp – Palmer amaranth? – Shattercane?
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Wisconsin CCA Training Weed Managem
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What is a weed? • A plant growing
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Weed Classification • There are s
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Why know life cycles? To plan weed
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Vegetative reproduction of perennia
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Management Implications • Croppin
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Plant Parts for Grasses and Broadle
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Plant Parts for Grasses
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Plant Parts for Grasses
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Plant Parts for Grasses Grass Blade
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Plant Parts for Grasses Grass Inflo
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Giant foxtail (Setaria faberi)
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Setaria Glauca • Dense spike like
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Large Crabgrass (Digitaria sanguina
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Quackgrass (Elytrigia repens)
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• Wirestem muhly is a perennial,
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Plant Parts for Broadleaves
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Plant Parts for Broadleaves Broadle
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Canada Thistle Cirsium arvense •
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Weed Families - Goosefoot CHENOPODI
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Chenopodium album Common lambsquart
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Ambrosia artemisiifolia Cotyledons
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Common ragweed (Ambrosia artemisiif
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Giant ragweed (Ambrosia trifida) As
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Eastern black nightshade (Solanum p
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Plant Families - Pigweed AMARANTHAC
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Redroot pigweed (Amaranthus retrofl
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Plant Families - Mallow MALVACEAE
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Velveltleaf (Abutilon theophrasti)
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Velveltleaf (Abutilon theophrasti)
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Horseweed (Conyza canadensis) Aster
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What is the other weed category? Se
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Yellow nutsedge (Cyperus esculentus
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Weed-Crop Competition “Competitio
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Competition for Nutrients: • The
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Competition for Water: • Water ma
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Competition for Nutrients • Weeds
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Effects of Plant Density: Plants re
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Should I spray? • Competition thr
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5% yield loss
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You can identify weeds, • Are the
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Management Practices: Survey of WI
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Web Resources • Crop Data Managem
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Why Study Herbicide Mode of Action?
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Most Cases of Crop Injury Occur fro
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Basis of Herbicide Selectivity •
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Crop Injury Symptoms • In most ca
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Injury Symptoms of Soil-Applied PSI
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Photosynthetic Inhibitors (primaril
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Chlorophyll • Pigments are molecu
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Protoporphyrinogen Oxidase Inhibito
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Injury Symptoms of PPO Inhibitors
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Lipid Synthesis Inhibitors • Lipi
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Injury Symptoms of LSI Herbicides
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Herbicides Inhibiting Amino Acid Sy
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Herbicides Inhibiting Amino Acid Sy
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Injury Symptoms of A.A. Synthesis I
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Plant Growth Regulators • This he
Page 148 and 149: Growth Regulator Herbicides Phenoxy
Page 154: Injury Symptoms of Plant Growth Reg
Page 158 and 159: Carotenoid Synthesis Inhibitors Iso
Page 163 and 164: Cell Reproduction • Cell division
Page 165: Injury Symptoms of DNA Herbicides
Page 169 and 170: Chloroacetamides and Thiocarbamates
Page 171: Injury Symptoms of Chloroacetamides
Page 176 and 177: Herbicide Resistance What’s the B
Page 178 and 179: Definitions Resistance: The change
Page 180 and 181: Timeline of herbicide resistance
Page 185 and 186: How do weeds become resistant? A po
Page 187 and 188: Changes are driven from a present g
Page 189 and 190: Question • How rare would a resis
Page 191 and 192: Alternating MOA’s why it’s impo
Page 193 and 194: 1990 1991 1992 1993 1994 1995 1996
Page 195 and 196: Evolving yield robbers…. Davis, V
Page 197: Giant Ragweed (Ambrosia trifida) Da
Page 201 and 202: Dr. Dave Stoltenberg Grant County G
Page 203 and 204: Avoiding Herbicide Resistance in We
Page 205: THANKS and good luck. Vince Davis,
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Wisconsin CCA Training Weed Management - Integrated Pest and ...

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