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

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Management Implications, or ‘Who cares’? • Weed management requires controlling reproduction – Different strategies are needed to eliminate seed production versus vegetative reproduction – Would mowing be an effective strategy to control a biennial in the basal rosette stage? – Should a contact herbicide be used to control Canada thistle?
Management Implications • Cropping systems influence weeds present – Crops compete with weeds differently i.e. some crops favor some weeds more than others – Tillage favors annual weeds and aids in weed seedbank persistence – Shallow and minimal tillage systems can spread creeping perennial weeds – No-tillage can favor biennial and perennial weeds, winter annual weeds, small seeded annual weeds
Page 1 and 2: Wisconsin CCA Training Weed Managem
Page 3 and 4: What is a weed? • A plant growing
Page 5 and 6: Weed Classification • There are s
Page 7 and 8: Why know life cycles? To plan weed
Page 9: Vegetative reproduction of perennia
Page 13 and 14: Plant Parts for Grasses and Broadle
Page 15 and 16: Plant Parts for Grasses
Page 17 and 18: Plant Parts for Grasses
Page 19 and 20: Plant Parts for Grasses Grass Blade
Page 21 and 22: Plant Parts for Grasses Grass Inflo
Page 23 and 24: Giant foxtail (Setaria faberi)
Page 26 and 27: Setaria Glauca • Dense spike like
Page 28: Large Crabgrass (Digitaria sanguina
Page 31 and 32: Quackgrass (Elytrigia repens)
Page 33 and 34: • Wirestem muhly is a perennial,
Page 35 and 36: Plant Parts for Broadleaves
Page 37 and 38: Plant Parts for Broadleaves Broadle
Page 43 and 44: Canada Thistle Cirsium arvense •
Page 45 and 46: Weed Families - Goosefoot CHENOPODI
Page 47 and 48: Chenopodium album Common lambsquart
Page 49 and 50: Ambrosia artemisiifolia Cotyledons
Page 51 and 52: Common ragweed (Ambrosia artemisiif
Page 53 and 54: Giant ragweed (Ambrosia trifida) As
Page 55 and 56: Eastern black nightshade (Solanum p
Page 57 and 58: Plant Families - Pigweed AMARANTHAC
Page 59 and 60: Redroot pigweed (Amaranthus retrofl
Page 62 and 63:
Plant Families - Mallow MALVACEAE
Page 64 and 65:
Velveltleaf (Abutilon theophrasti)
Page 66 and 67:
Velveltleaf (Abutilon theophrasti)
Page 68 and 69:
Horseweed (Conyza canadensis) Aster
Page 70 and 71:
What is the other weed category? Se
Page 72 and 73:
Yellow nutsedge (Cyperus esculentus
Page 74:
Weed-Crop Competition “Competitio
Page 77:
Competition for Nutrients: • The
Page 80 and 81:
Competition for Water: • Water ma
Page 82 and 83:
Competition for Nutrients • Weeds
Page 84:
Effects of Plant Density: Plants re
Page 87 and 88:
Should I spray? • Competition thr
Page 89 and 90:
5% yield loss
Page 91 and 92:
You can identify weeds, • Are the
Page 93 and 94:
Management Practices: Survey of WI
Page 95 and 96:
Web Resources • Crop Data Managem
Page 97:
Why Study Herbicide Mode of Action?
Page 103 and 104:
Most Cases of Crop Injury Occur fro
Page 105 and 106:
Basis of Herbicide Selectivity •
Page 107 and 108:
Crop Injury Symptoms • In most ca
Page 109 and 110:
Injury Symptoms of Soil-Applied PSI
Page 112 and 113:
Photosynthetic Inhibitors (primaril
Page 116 and 117:
Chlorophyll • Pigments are molecu
Page 118 and 119:
Protoporphyrinogen Oxidase Inhibito
Page 121:
Injury Symptoms of PPO Inhibitors
Page 126 and 127:
Lipid Synthesis Inhibitors • Lipi
Page 128:
Injury Symptoms of LSI Herbicides
Page 131 and 132:
Herbicides Inhibiting Amino Acid Sy
Page 133 and 134:
Herbicides Inhibiting Amino Acid Sy
Page 140:
Injury Symptoms of A.A. Synthesis I
Page 146 and 147:
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 and 198:
Giant Ragweed (Ambrosia trifida) Da
Page 199 and 200:
Of most concern in WI: Glyphosate-R
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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