New Selective Herbicides for Weed Control in Turf. 10/09/2014

Transcription

1 New Selective Herbicides for Weed Control in Turf. 10/09/2014 Dr. Joe DeFrank UH-TPSS Kaipo & Steve H.C. & C. Rey I. TGD Orville Baldos & Scott Lukas-Resh Assoc.

2 For more information on topics covered

3 For more information on topics covered

4 For more information on topics covered Viewing tips for live seminar presentations Open 2 browser windows 1- for video and 1 for high resolution slides as pdf

5 For more information on topics covered Viewing tips for live seminar presentations Open 2 browser windows 1- for video and 1 for high resolution slides as pdf

6 Topics Covered LICH Grassy Weed ID for turf 2. Turf research history w/tenacity 2006 to Tenacity + Sencor use on non-dormant Bermuda grass 4. Waipio Soccer complex weed cleanup case study starting in Dec Summer 2014 Waipio weed cleanup 6. Time of year consideration for grassy weed control

7 Grassy Weeds in Hawaiian Turf Australian Carpet Grass Hilo Grass Goose grass Dallisgrass Love grass Henry s and Blanket CG Star Grass Smut grass

8 Australian carpet grass Dominate weedy grasses

9 Hilo grass Dominate weedy grasses

10 Dominate weedy grasses Hilo grass A. Carpet grass

11 Goose grass

12 Dallisgrass

13 Love grass Carolina Love grass

14 Henry s Crabgrass

15 Blanket Crabgrass

16 Star Grass BG SG

17 Star Grass

18 Smut grass

19 Post emergence for Grass & Broadleaf weed control Tenacity Single product Use on dormant Bermuda, post and pre too. Other grass sensitive are: zoysia, seashore paspalum and kikuyugrass Primary use on Tall fescue, Kentucky blue grass Safe on warm season grass: Centipedegrass, St. Aug. turf farm only, injury will occur. Weed control: crabgrasses, goosegrass, love grass, yellow nutsedge and many broadleaf weeds

20 Research History of Tenacity w/jd in HI turf grasses: response to Tenacity trade show tip: try Revolver + Tenacity April Tank mix with Rev+Ten at Waipio May Happy Accident with JD & H.C. & C July Revolver/Celsius followed with Ten +Sen Dec. H.C. & C. Ten + Sen on 8 acres at Waipio Mar. Spot treatment w/meterjet w/ten+sen 1-4X Aug. Low dose Ten + Sen following Specticle then Rev&Cel. Tenacity = Mesotrione Blocks pigment formation that protects Chlorophyll from sunlight

21 Response of 5 turf types to Tenacity UH Magoon Nov Turf types treated: 1. Tiway B.G. 2. TifEagle - B.G. 3. Sea Isle S.P. 4. Zenith Zoysia 5. Legacy S.P. Treatments: 1. Untreated 2. Tenacity 8 oz/a +.25 v/v NIS (Liberate) 3. Tenacity 16 oz/a +.25 v/v NIS (Liberate)

22 0-DAS 8-DAS 8oz 16 oz Tenacity on TifWay 419 B.G. 8oz 22-DAS 16 oz

23 0-DAS 8-DAS 8oz 16 oz Tenacity on TifEagle B.G. 8oz 22-DAS 16 oz

24 0-DAS 8-DAS 16 oz 8oz Tenacity on Zenith Zoysia. 16 oz 22-DAS 8oz

25 0-DAS 16 oz 8-DAS 8oz Tenacity on SI2000 S.P. 16 oz 22-DAS 8oz

26 0-DAS 8-DAS 16 oz 8oz Tenacity on Legacy S.P. 16 oz 22-DAS 8oz

27 8oz 16oz SI TURF TE 16oz TYPES 22 DAS TENACITY % MGN Color.25 NIS 8 oz/a 16 oz/a SI2K TE ZEN L_SP ZEN 8oz 16oz 16oz 8oz LEG-SP 16oz 8oz 8oz In 2006, Tenacity usefulness in warm season turf in HI =???

28 2013 trade show tip: try Revolver + Tenacity HIDOA can Tenacity be applied to non-dormant Bermuda grass

29 Research History of Tenacity w/jd turf grasses: response to Tenacity trade show tip: try Revolver + Tenacity April Tank mix with Rev+Ten at Waipio May Happy Accident with JD & H.C. & C July Revolver followed with Ten +Sen. Result = Revolver + Tenacity: Initial injury higher Dec. but long H.C. term & C Ten control + Sen of 8 acres goose at grass Waipio appeared to be reduced compared to Tenacity alone. Tank mix not particularly useful. BUT

30 Research History of Tenacity w/jd turf grasses: response to Tenacity trade show tip: try Revolver + Tenacity April Tank mix with Rev+Ten at Waipio May 20 = Happy Accident W/H.C. & C July Revolver followed with Ten +Sen Dec. H.C. & C Ten + Sen 8 acres at Waipio

31 To the right of yellow line, tractor mounted boom spray with Sencor (4 oz/a) + MSMA (1.8 lb/a) on 05/20/13 same day that JD spray 3 rd application of Tenacity (4 oz/a) only. DeFrank s Tenacity spray is to the left of the yellow line. Dead Love and Goosegrass is due to overlap of last Tenacity spray and C&C boom spray with Sencor + MSMA. 401 untreated plot 405 with Tenacity applied 7 days prior to photos DeFrank s Tenacity spray extended from the marked plot area to 5 to 6 feet beyond the back of plots. Note lack of Love grass kill in the untreated strip above the area with multiple herbicide applications.

32 Close-up of area treated with 4 oz/a Sencor lb/a MSMA (as HCC spray) + 4 oz/a Tenacity (DeFrank s research sprayer) applied on the same day (05/20/13). The only green tissue in this image is the BERMUDA GRASS!!!

33 Research History of Tenacity w/jd turf grasses: response to Tenacity trade show tip: try Revolver + Tenacity April Tank mix with Rev+Ten at Waipio May Happy Accident with JD & H.C. & C July Revolver or Celsius 1 st, wait 2 weeks then Tenacity +Sencor, also looked at tank mix T+S+MSMA.

34 Commonly used Postemergence for Grassy weed control Sencor 75DF Single product, post in turf but has pre too. Use on Bermuda Control for goosegrass in HI, On bare ground has good preemergence activity Pre ban mixed with MSMA for wider spectrum grass and purple nutsedge control

35 0 DAS Rev. 2 wks. split Ten+Sen at Waipio DAS-01 Rev. wait 2wks Ten (2.5 oz/a) + Sen (4 oz/a) + MSO 1%

36 0 DAS Rev.+ Ten. at Waipio DAS-02 Rev. wait 2wks Ten (2.5 oz/a) + Sen (4 oz/a) + MSO 1%

37 Unt-2wks Ten (2.5 oz/a) + Sen (4 oz/a) + MSO 1% Rev. + Ten. at Waipio DAS-02

38 All treatments applied 2X s at back of exp. Best control Injury to BG OK Rev. + Ten. at Waipio DAS-02 Unt-2wks Ten (5.0 oz/a) + Sen (8 oz/a) + MSO 1%

39 Untreated 102 DAS02 12/03/13

40 2X 408 = 5oz Ten + 8oz Sen 102 DAS02 08/09 to 12/03/13

41 Untreated 102 DAS02 12/03/13 2X 408 = 5oz Ten + 8oz Sen 102 DAS02 08/09 to 12/03/13

42 Results of Revolver or Celsius Applied 1 st wait 2 weeks then follow with Tenacity + Sencor 1. Goose grass control was slightly better with Revolver than Celsius applied 2 weeks prior T+S application. 2. Celsius appeared to cause a slight reduction to T+S activity. 3. Addition of MSMA did not add noticeably more activity on Goose grass that T+S alone. 4. 2X application in demo area establishes best activity on Goose grass with 5 oz/a Ten. and 8 oz/a Sen.

43 Research History of Tenacity w/jd turf grasses: response to Tenacity trade show tip: try Revolver + Tenacity April Tank mix with Rev+Ten at Waipio May Happy Accident with JD & H.C. & C July Rev. or Cel. followed with Ten +Sen Dec. H.C. & C Ten + Sen 8 acres at Waipio H.C. & C. Applies 4 oz Tenacity + 8 oz Sencor + 1% MSO - 2X s 12/10 & 12/23/2013 Winter Start Program

44 22 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/06/14

45 35 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/26/14

46 22 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/06/14 Dallis grass.

47 35 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/26/14

48 22 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/06/14

49 35 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/26/14

50 22 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/06/14

51 35 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/26/14

52 35 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/26/14

53 35 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/26/14

54 CONCLUSIONS FOR st Qrt Revolver + Tenacity Tank-Mix not useful 2. Revolver or Celsius 2-wks. prior to Tenacity + Sencor, shows R>C w/little improvement 3. MSMA not needed with Tenacity + Sencor Tank-Mix. 4. Tenacity 4 oz/a + Sencor 8 oz/a applied 2X s very good for many grassy weeds in Bermuda, Kaki weed/legumes too days after Ten+Sen and no PREs = seedling weeds need to be controlled.

55 H.C.&C. applies Dismiss (6oz/a) + Barricade (10 oz/a) 2 Xs for control of seedling goose grass on 02/11/14 = 50 DAS02 & 02/25/14 = 64 DAS02 Photo on 02/04/14 Rains in Jan-Feb prevented timely post apps. Goose grass into post tiller stage 43 DAS02

56 H.C.&C. applies Dismiss (6oz/a) + Barricade (10 oz/a) 2Xs for control of seed goose grass on 02/11/14 = 50 DAS02 & 02/25/14 = 64 DAS02 Photos on 02/04/14

57 H.C.&C. applies Dismiss (6oz/a) + Barricade (10 oz/a) 2Xs for control of seed goose grass on 02/11/14 = 50 DAS02 & 02/25/14 = 64 DAS02 GG control at pre-tiller Post tiller NO-CAN. Photos on 02/19/14 8 DAS1st Dism+Barr

58 H.C.&C. applies Dismiss (6oz/a) + Barricade (10 oz/a) 2Xs for control of seed goose grass on 02/11/14 = 50 DAS02 & 02/25/14 = 64 DAS02 Photo on 02/19/14 8 DAS1 Dism+Barr BG=OK

59 H.C.&C. applies Dismiss (6oz/a) + Barricade (10 oz/a) 2Xs for control of seed goose grass on 02/11/14 = 50 DAS02 & 02/25/14 = 64 DAS02 Photos on 03/03/14 6 DAS 2Xs Dism+Barr

60 Optimum Goose grass size for Dismiss activity is pre-tiller stage 6-leaf pre-tiller 3-tiller goose grass Timing isn t everything it s the only thing!

61 H.C.&C. applies Dismiss (6oz/a) + Barricade (10 oz/a) 2Xs for control of seed goose grass on 02/11/14 = 50 DAS02 & 02/25/14 = 64 DAS02 22 DAS02 Ten(4 oz/a)+sen (8 oz/a) 01/06/14 6 DAS02 Dism +Barr - Photos on 03/03/14 70 DAS 2nd Ten=Sen

62 Conclusions of Waipio Complex winter 2013 clean up 1. Nov & Dec Bermuda Grass is most in need of release from grassy weed encroachment days after 2 nd Ten+Sen = apply preemergence for GG seedling control needed. Rainy weather = more timely seedling weed control needed. 3. Dismiss + Barricade best at GG pre-tiller stage. Larger sizes not controlled. 4. Complete BG fill in post 2Xs w/ten+sen = days. 5. Spot treatments needed for larger escaped goose grass and other grassy weeds. 6. Better to prevent seedlings growth with preemergence.

63 Spot treatments based on broadcast spray application Waipio broadcast spray application: Tenacity = 5 oz/a Sencor = 8 oz/a Use Meter Jet spray gun with TeeJet Full cone tip = TG-3 Application height to produce an 18 in. diameter circle 1X rate 1 Gallon of spot mix = 1.5 ml Tenacity 2.3 grams Sencor 38 ml MSO = 1% v/v 18 in. Apply 15.4 ml to 18 in diameter circle = 1X Waipio Broadcast rate

64 Objective of Waipio Spot application experiment: Determine goose grass and Bermuda grass response to Spot kill rate with single application. Treatments: 1,2 & 4X Waipio Broadcast & 1% MSO blank. Spot treatments based on broadcast spray application Start 03/06/14

65 Results of Spot Application to Bermuda Grass 6 Days after spray 03/12/14 1X MSO 1% 4X 4X 2X

66 Results of Spot Application to Bermuda Grass 18 Days after spray 03/24/14 1X MSO 1% 4X 4X 2X

67 Results of Spot Application to Bermuda Grass 32 Days after spray 04/07/14 1X

68 Results of Spot Application to Bermuda Grass 32 Days after spray 04/07/14 2X

69 Results of Spot Application to Bermuda Grass 32 Days after spray 04/07/14 4X

70 Conclusions of Waipio Complex 1, 2 & 4X Spot treatments All spot applications caused noticeable circles in common Bermuda grass. 2. 4X spot was most noticeable 3. 4X provided 1-application kill of large goose grass 4. 2X spot application ok 1-shot on small goose grass=6 LF 5. 1X injury gone in 18 days 6. 4X injury gone in 53 days 7. TeeJet TG-3 solid cone tip has higher deposition on outer band of cone. NEXT SUMMER START PROGRAM

71 Commonly used post emergence for Goose grass weed control Revolver Single product, post in turf. Use on Bermuda Control for goosegrass in HI, Systemic uptake, plant grows without essential components and dies. Active plant growth needed for uptake and activation

72 Commonly used Post emergence for Broadleaf & certain grass weed control Celsius 3 compound mix, includes dicamba Use on Bermuda Control of important broadleaf weed HI: creeping beggars tic, broadleaf plantain, prostrate spurge, horse weed and oxalis. Control of grassy weeds include Love grass relative, sandbur, Australian Carpet grass relative. Systemic uptake, multiple modes of actions. Active plant growth needed for uptake and activation.

73 Celsius Control of important broadleaf weed HI: creeping beggars tic, broadleaf plantain, prostrate spurge, horse weed and oxalis.

74 Celsius Control of important grassy weeds: sandbur, A. carpet- & Love Gr.-rel Sandbur-C. echinatus Carpet grass-a. affinis Gopher LG-E. ciliaris

75 Pre emergence for Broadleaf & certain grass weed control Specticle Single compound pre activity only Use on Bermuda with preemergence activity only Control of important broadleaf weed HI: horseweed, broadleaf plantain, prostrate spurge and oxalis. Control of grassy weeds include: Henry s crab grass, Goose grass, Guinegrass, Green Kyllinga. 4-5 months of Goose grass control with 3.7 oz/a. Irrigation required for activation. Pruning of new roots of weeds and turf to be expected.

76 HC& C summer 2014 Waipio clean up Experimental setup to low dose Tenacity + Sencor Tank mix experiment. Summer 2014 protocol May 8, 2014 apply CN9 (10 gal/a) + Specticle (3.5 dry-oz/a) 26 DAYS June 3, 2014 apply Revolver 26 liq-oz/a + Celsius 3 dry-oz/a + Liberate surfactant.25%. 17 DAYS June 20, 2014, 2 nd app Rev. + Cel. 40 DAYS Old roots dead & New root growth from Goose and Love grass, CUE to start next spray with different mode of action, 83 DA-Spec.

77 40 days post 2 nd Application of Revolver + Celsius Visual cue for cleanup of Goose and Love grass Using alternative MOA herbicide tank mix.

78 40 DAS2 Rev+Cel = Easy extraction of NORMAL looking Love grass

79 Love grass roots emerge from stem nodes days after R+C 2Xs.

80 Love grass roots emerge from stem nodes days after R+C 2Xs.

81 Goose grass roots emerge from stem 40 nodes DA2-Rev/Cel days after R+C 2Xs.

82 Goose grass Love grass Compromised main roots allows flush of new roots. Specticle in place to prevent root penetration into soil provides wider application window for low dose Tenacity + Sencor to complete weed control process!

83 40 DAS2 Rev. & Cel. mostly Love grass at start of low dose T+S on 08/01/14

84 Weed pressure in foreground this area not sprayed with Revolver & Celsius shows large Goose grass

85 Weed pressure in foreground this area not sprayed with Revolver & Celsius shows large Goose grass

86 Low dose Tenacity + Sencor Tank mix study 42 Days after 2 nd Rev. + Cel. Application Started 08/01/2014, 2 nd app 11 days later. Treatment # 2Xs Herbicides Amount/a 1 Tenacity + Sencor + NIS (Excel 90) 0.25% 2 Tenacity + Sencor + NIS (Excel 90) 0.25% 3 Tenacity + Sencor + NIS (Excel 90) 0.25% 5 liq-oz/a + 1 dry-oz/a 5 liq-oz/a + 2 dry-oz/a 5 liq-oz/a + 4 dry-oz/a 4 NIS (Excel 90) 0.25%

87 01= T-5 oz/a + S-1 oz/a 02 = T-5 oz/a + S-2 oz/a 03 = T-5 oz/a + S-4 oz/a 04 = NIS 0.25% v/v Response 3 DAS1

88 7 days after 1 st spray application 08/08/ = T-5 oz/a + S-1 oz/a 02 = T-5 oz/a + S-2 oz/a 03 = T-5 oz/a + S-4 oz/a 04 = NIS 0.25% v/v

89 01-7DAS1 5 OZ/A-T 1 OZ/A-S

90 02-7DAS1 5 OZ/A-T 2 OZ/A-S

91 03-7DAS1 5 OZ/A-T 4 OZ/A-S

92 04-7DAS1 NIS 0.25%

93 Herbicide type and application sequence work together to control problem grassy weeds 1. Revolver + Celsius kills old roots allows for new roots from stem nodes. 2. Specticle prevents new roots from entering the soil, provides wider window for control. 3. Tenacity moves to actively growing areas and kills new roots. 4. Sencor enhances Tenacity action in leaves. 5. All factors work together for control of GG & LG at reduced Sencor rates (i.e. 2-4 oz/a)

94 8 days after 2 nd spray application 08/20/14 Note frosting in areas where turf was scalped = T-5 oz/a + S-1 oz/a 02 = T-5 oz/a + S-2 oz/a 03 = T-5 oz/a + S-4 oz/a 04 = NIS 0.25% v/v

95 GG 04-8DAS2 NIS 0.25% LG

96 GG 01-8DAS2 5 OZ/A-T 1 OZ/A-S LG

97 02-8DAS2 GG 5 OZ/A-T 2 OZ/A-S LG

98 03-8DAS2 GG 5 OZ/A-T 4 OZ/A-S LG

99 15 days after 2 nd spray application 08/27/ = T-5 oz/a + S-1 oz/a 02 = T-5 oz/a + S-2 oz/a 03 = T-5 oz/a + S-4 oz/a 04 = NIS 0.25% v/v

100 Treatmen t # 2Xs Weed Control Data for Low dose Tenacity + Sencor Tank mix study 08/20/14 = 8DAS2, 09/19/14 = 38 DAS2 Herbicides 1 Tenacity 5 liq-oz/a + Sencor 1 dry-oz/a + NIS (Excel 90) 0.25% Live Love Gr # 08/01/14 Live Love Gr # 08/20/14 % Goose Gr Control 09/18/ Tenacity 5 liq-oz/a + Sencor 2 dry-oz/a + NIS (Excel 90) 0.25% 63 3 Tenacity 5 liq-oz/a + Sencor 4 dry-oz/a + NIS (Excel 90) 0.25% NIS (Excel 90) 0.25%

101 Trt Day 5 OZ/A-T 2 OZ/A-S 54 days from start Trt DAS2 5 OZ/A-T 2 OZ/A-S

102 02-38 DAS2 5 OZ/A-T 2 OZ/A-S

103 03-38 DAS2 5 OZ/A-T 4 OZ/A-S

104 Putting all together Starting Love and Goose grass in HI - Fall/Winter Complete turf grass reset major damage is OK Without Love and Goose Grass PRE-treatment with Rev. & Cel and Spec. 1. Starting Dec Tenacity (5 oz/a) + Sencor (8 oz/a) + MSO 1% 3. Apply 2 Xs 14 days apart. 4. Apply Ronstar-G 7 days after 2 nd application. 5. Prepare Tenacity + Sencor spot treatment for larger GG/LG survivors 1 Gallon of spot mix = 1.5 ml Tenacity 2.3 grams Sencor 38 ml MSO = 1% v/v 6. Fertilize for rapid recovery and fill in. 18 in. Apply 15.4 ml to 18 in diameter circle = 1X Waipio Broadcast rate

105 Putting all together Starting Love and Goose grass HI Spring/Summer Bermuda grass damage must be minimized 1. Starting in Apr.-Aug. 2. Foliar feed and Specticle (3.5 oz/a) days uniform irrigation & mowing. 4. Revolver (26 oz/a) + Celsius (3 oz/a) + NIS.25% 5. 2 applications 21 days apart see new leaf growth as cue for 2 nd app. 6. See growth cue DAS2 = new root growth. 7. Tenacity (5 oz/a) + Sencor (2-4 oz/a) + NIS.25%. 8. Reapply Specticle prior to start of rainy season.

106 Production of Native Hawaiian Plant Seeds & Simulated Native Dry Land Ecosystem On Hawaii s Roadside areas

107 DOT-Funded Projects Project Objectives 1. Develop establishment and maintenance protocol for plantings of Native HI plants on roadside areas. 2. Describe seed harvest index and seed cleaning protocols for 4 grass and 5 broadleaf species. 3. Install 8,000 ft 2 plantings of 5 broadleaf native HI plants for roadside seed producing. 4. Install roadside demonstration planting to simulate native dry land ecosystem on roadside area

108 1. Develop establishment and maintenance protocol for plantings of Native HI plants on roadside areas.

109 1. Develop establishment and maintenance protocol for plantings of Native HI plants on roadside areas.

110 1. Develop establishment and maintenance protocol for plantings of Native HI plants on roadside areas.

111 Install roadside demonstration plantings to simulate native dry land ecosystem on roadside areas.

112 Install roadside demonstration planting to simulate native dry land ecosystem on roadside area

113 Install roadside demonstration planting to simulate native dry land ecosystem on roadside area

114 Install 8,000 ft 2 plantings of 5 broadleaf native HI plants for roadside seed producing.

115 Install 8,000 ft 2 plantings of 5 broadleaf native HI plants for roadside seed producing.

116 Install 8,000 ft 2 plantings of 5 broadleaf native HI plants for roadside seed producing.

117 Install 8,000 ft 2 plantings of 5 broadleaf native HI plants for roadside seed producing.

118 Install 8,000 ft 2 plantings of 5 broadleaf native HI plants for roadside seed producing.

119 Install 8,000 ft 2 plantings of 5 broadleaf native HI plants for roadside seed producing.

120 For more information Dr. Joe DeFrank Ph: On line video and slideshow:

121