Legume establishment after herbicides 2010

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Legume establishment after herbicides 2010

  1. 1. LegumeLegume establishmentestablishment after herbicidesafter herbicides Variability in WisconsinVariability in Wisconsin over 3 yearsover 3 years Mark RenzMark Renz University of Wisconsin-University of Wisconsin- MadisonMadison
  2. 2. 2006-2007 Study • Treated in fall – Arlington 10/25/06 – Lancaster 10/20/06 • Planted in mid-May (7 MAT) – Alfalfa 11 lbs/A – Red clover 8 lbs/A
  3. 3. Herbicide establishment quantity 1 YAP Alfalfa Red clover Alfalfa Red clover Milestone 7 fl oz/A YES YES NO NO Stinger 1 pt/A NO NO NO NO Escort/ Ally 1.0 oz/A YES YES YES YES Weedmaster 4 pt/A NO NO NO NO Plateau 12 fl oz/A NO YES NO NO Reductions legumesReductions legumes compared to untreated controlscompared to untreated controls Treated in fall, planted in spring
  4. 4. Herbicide establishment quantity 1 YAP Alfalfa Red clover Alfalfa Red clover Milestone 7 fl oz/A NO NO NO NO Stinger 1 pt/A YES* NO NO NO Escort/ Ally 1.0 oz/A NO NO NO NO Weedmaster 4 pt/A NO NO NO NO Plateau 12 fl oz/A NO NO NO NO Reductions legumesReductions legumes compared to untreated controlscompared to untreated controls Treated in fall, planted following September * At one site only
  5. 5. 2007-2008 Study2007-2008 Study • Treated Milestone and Ally (Escort) on 10/23/07 • Frost seeded red clover at 10 lbs/a: 3/20/08 • No-till drilled red clover at 12 lbs/a: 4/18/08
  6. 6. Cover of Red Clover 1 year after spraying 1 year after planting Herbicide Frost seed No till Frost seed No till Milestone 3 fl oz/A 7.3 2.0 16.7 4.8 Milestone 5 fl oz/A 2.5 1.0 1.9 0 Milestone 7 fl oz/A 1.3 0.5 2.8 0 Ally 1 oz/A 8.5 15.0 17.6 28.8 UTC 25.0 31.3 36.1 42.6 Reductions legumesReductions legumes compared to untreated controlscompared to untreated controls Treated in fall, planted in spring Highlighted boxes indicate values are different than UTC
  7. 7. 2008-2009 Study2008-2009 Study • Treated at two timings – Summer 7/17/08 – Fall 10/9/08 • No-till drilled 4/16/09 – 8 lb/A Duration Red Clover – 14 lb/A 6415 Garst Alfalfa – 3 lb/A Crescendo Ladino White Clover
  8. 8. Stems m2 COVER Herbicide 2 MAP 4 MAP 2 MAP 4 MAP Chaparral 2.5 oz/A Summer 66 88 6 62 Chaparral 3.3 oz/A Summer 55 73 5 51 Forefront 32 fl oz/A Summer 66 70 8 57 Forefront 42 fl oz/A Summer 57 61 8 48 Grazon 32 fl oz/A Summer 69 74 7 54 Chaparral 2.5 oz/A Fall 54 53 7 33 Chaparral 3.3 oz/A Fall 60 59 5 40 Forefront 32 fl oz/A Fall 43 72 5 51 Forefront 42 fl oz/A Fall 36 48 3 27 Grazon 32 fl oz/A Fall 86 91 9 65 UTC 82 71 21 50 Red Clover ResponseRed Clover Response Treated summer or fall, planted following spring
  9. 9. Stems m2 COVER Herbicide 2 MAP 4 MAP 2 MAP 4 MAP Chaparral 2.5 oz/A Summer 63 74 7 45 Chaparral 3.3 oz/A Summer 63 91 7 61 Forefront 32 fl oz/A Summer 105 94 13 61 Forefront 42 fl oz/A Summer 95 87 12 57 Grazon 32 fl oz/A Summer 90 79 12 46 Chaparral 2.5 oz/A Fall 65 63 7 33 Chaparral 3.3 oz/A Fall 75 60 8 38 Forefront 32 fl oz/A Fall 85 70 8 40 Forefront 42 fl oz/A Fall 55 47 5 20 Grazon 32 fl oz/A Fall 89 88 10 49 UTC 72 72 8 42 Alfalfa ResponseAlfalfa Response Treated summer or fall, planted following spring
  10. 10. Stems m2 COVER Herbicide 2 MAP 4 MAP 2 MAP 4 MAP Chaparral 2.5 oz/A Summer 87 94 8 50 Chaparral 3.3 oz/A Summer 84 94 10 57 Forefront 32 fl oz/A Summer 90 94 11 58 Forefront 42 fl oz/A Summer 67 85 8 49 Grazon 32 fl oz/A Summer 90 99 10 62 Chaparral 2.5 oz/A Fall 48 68 5 31 Chaparral 3.3 oz/A Fall 62 68 8 40 Forefront 32 fl oz/A Fall 76 90 9 53 Forefront 42 fl oz/A Fall 56 60 6 27 Grazon 32 fl oz/A Fall 91 70 11 33 UTC 63 99 5 67 White Clover ResponseWhite Clover Response Treated summer or fall, planted following spring
  11. 11. Summary of experimentsSummary of experiments Exp. dates Applied to Fall appl. date Planting date Winter Soil temp 2006- 07 Tilled field (Bareground) 10/20 10/25 S=5/18 F=9/12 S=5/16 F= 9/6 2007- 08 Established Pastures 10/23 3/20 (Frost) 4/18 (no-till Colder than 08-09 2008- 09 Established Pastures with grazing 10/9 4/16 Warmer than 07-08 Experiments with successful establishment are highlighted
  12. 12. ConclusionConclusion • Fall applications of Milestone or Ally CAN reduce establishment the following spring – Dependant on date and rate applied – Date planted – Soil Temperature – Soil moisture? – Method of planting? • If legumes are critical – consider spot treating instead of broadcast – Waiting to plant until the late summer or following spring

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