Field Bindweed Management in. Tom Lanini

Transcription

1 Field Bindweed Management in Processing Tomatoes Tom Lanini

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5 Early Attempts at Understanding and dmanaging Field ldbindweed d Timing of Field Bindweed removal Evaluation of Carotenoid Biosynthesis inhibitors Evaluation of miscellaneous herbicides

6 Field bind dweed sh hading (% %) Proportion of Tomatoes shaded by Field Bindweed d July 19, 1988 Lanini and Miyao Full Weeks of Bindweed exclusion season

7 s/ac) ield (ton Tomato y Tomato yield as influenced by the Field Bindweed exclusion period 0 weeks 2 weeks 4 weeks 6 weeks 8 weeks 10 weeks Lanini and Miyao 1988 Full season

8 Tomato brix (%) as influenced by the Field Bindweed exclusion period rix (%) Tomato b weeks 2 weeks 4 weeks 6 weeks 8 weeks 10 weeks Lanini and Miyao 1988 Full season

9 Tomato Yield in relation to weeks with field bindweed d competition i 40 Tomato yield (ton ns/ac) Weeks before Field Bindweed removal Lanini and Miyao 1988

10 Field bindweed conclusions Early removal is need to avoid mechanical injury Early competition reduced yield and brix

11 Command 0.40 lb + Matrix 0.03 lb/acre PRE

12 Callisto (mesotrione) 0.22 lb/ac PRE

13 Balance (isoxaflutole) lb PRE

14 Staple lb/ac

15 Mustard Meal 400 lbs per acre PRE

16 Two Bindweed studies in 2010 Site 1 treated 3 X in the spring with glyphosate + Shark using a WeedSeeker - subsurface drip irrigated Site 2 Oat cover crop - chopped and removed in late spring and beds prepared - sprinkler irrigation used after transplanting and furrow irrigation used remainder of season

17 Treatments at Site 1 in 2010 Treatment Timing Rate (lbs/ac) Dual Magnum PRE 1.6 Sandea PRE Prowl H2O PRE 1.4 Matrix PRE 0.03 Treflan PRE or Shark or Matrix POST Matrix POST 0.03 Matrix POST Matrix POST (20 day interval) 0.03 Shark POST shielded Shark POST shielded d Shark POST shield (20 day) 0.031

18 Site on May 11, after mechanical incorporation

19 Field Bindweed Cover (%) on June 23, 2010 Field bindw weed cove er (%) 14 alone + Shark + Matrix Dual Magnum 1.6 lb ai Prowl H2O Matrix Treflan Sandea 14lbsai lbsai lbs ai lbs ai Untreated = 13% cover

20 Field Bindweed Cover (%) on June 23, 2010 Fie eld bindwe eed cover (%) Matrix 0.03 Matr + Matr POST POST Shark Shark + Shark POST POST Untreated = 13% cover

21 Field Bindweed Cover (%) at Harvest Field bindw weed cove er (%) 50 alone +Shark +Matrix Dual Prowl H2O Matrix Treflan Sandea Magnum 1.4 lbs ai 0.03 lbs ai 1.0 lbs ai lbs ai 1.6 lb ai Untreated = 46% cover

22 Field Bindweed Cover (%) At Harvest Fie eld bindwe eed cover (%) Matrix 0.03 Matr + Matr POST POST Shark Shark + Shark POST POST Untreated = 46% cover

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24 Matrix 0.03 lb/a - POST

25 Prowl H2O 1.4 lbs/ac

26 Treflan 1.0 lb/ac

27 Tomato Yield (tons/acre) relative to treatmentt t Yield (t/ac) 70 alone + Shark + Matrix Dual Prowl H2O Matrix Treflan Sandea Magnum 1.6 lb ai 1.4 lbs ai 0.03 lbs ai 1.0 lbs ai lbs ai Untreated = 58.1 tons/ac

28 Treatments at Site 2 in 2010 Treatment Timing Rate (lbs/ac) Dual Magnum PRE 1.6 Sandea PRE Prowl H2O PRE 1.4 Matrix PRE 0.03 Zeus PRE or Shark or Matrix POST Matrix POST 0.03 Matrix POST Matrix POST (20 day interval) 0.03 Shark POST shielded Shark POST shielded d Shark POST shield (20 day) 0.031

29 Field Bindweed Seedling Control (%) on June 23, 2010 g Field bin ndweed co ontrol (%) Seedlin 100 alone + Shark + Matrix * Dual Prowl H2O Matrix Zeus Sandea Magnum 14lb lb lb lb 1.6 lb * = Zeus used at 0.20 lb ai

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31 Dual 1.6 lbs/ac

32 Matrix 0.03 lb/ac

33 Matrix 0.03 lb/ac

34 Prowl H2O 1.4 lbs/ac

35 Zeus 0.15 lbs/ac

36 Field Bindweed Cover (%) At Harvest Field bindw weed cove er (%) 60 alone + Shark + Matrix * 0 Dual Magnum Prowl H2O 14lb 1.4 Matrix 003lb 0.03 Zeus 010lb 0.10 Sandea lb 1.6 lb * = Zeus used at 0.20 lb ai Untreated = 57.5% cover

37 Tomato Yield (tons/acre) in relation to treatment Yield (t/ac) Dual Magnum 1.6 lb * = Zeus used at 0.20 lb ai alone + Shark + Matrix Prowl H2O Matrix Zeus Sandea 1.4 lb 0.03 lb 0.10 lb lb * Untreated = 21.3 tons/ac

38 Field bindweed conclusions from 2010 studies Treflan and Prowl H2O were best at suppressing established field bindweed POST Shark treatments improved control in most cases (tomato injury???) Matrix and Zeus good at suppressing seedling bindweed, but less effective against established bindweed d

39 Prowl H 2 O 0.95 lb + Matrix 0.03 lb/acre PRE

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41 Field bindweed can have a large root biomass, relative to top growth Treatments rarely 100% effective Repeated treatments are needed for best suppression Rotation with corn or wheat will allow selective herbicide use

42 Drift, Carryover, or???

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46 Treflan / Prowl H 2 O Good dodder and field bindweed suppression Require some form of incorporation Place herbicides in top two inches of soil and make certain roots of the transplant t are below the treated soil.

47 Questions?