Research & Development Field Report – 4th Edition

2023 AGRONOMIC REVIEW AND PLANNING FOR 2024

• Evaluate Agronomic Plan from 2023
  • Document pests that were problematic or hard to control.
  • Note emerging threats and ongoing problems.
  • Assess product performance: Which products lived up to expectations? Which did not?
• Plan and Save for 2024: Green Dividends EOP Highlights (Sept. 1-Dec. 1, 2023)
  • Stick with proven Pythium control and load-up on Segway^® SC Fungicide.
    • $88 rebate per 39.2 fl. oz. bottle.
  • NEW – Arkon™ Herbicide Liquid; keep sedge and kyllinga away with very early post control.
    • Applications may be made to greens; two applications are optimal for kyllinga control.
    • $47.50 rebate per 2.5 gal. container.
  • Control spring deal spot (SDS) with one well-timed application of Kabuto^® Fungicide SC
    • Purchase Sept. 1 for 2023 fall application(s) with a $63.50 rebate per 1 gal. container.
  • Buy & save on weed control staples: SpeedZone^® EW Broadleaf Herbicide for Turf, Avenue™ South Broadleaf Herbicide, and Q4^® Plus Turf Herbicide for Grassy & Broadleaf Weeds.
  • Visit PBIGordonTurf.com/GreenDividendsEOP to see the full list of qualifying products and program details.

WEEDS

• Broadleaf Weed Control in Cool-Season Turf
  • Late-summer or early-fall prior to first frost is a great time to control perennial broadleaves.
  • Q4^® Plus is a great product for hard to control weeds such as dandelion, crabgrass, ground ivy, plantain and suppression of yellow nutsedge, whereas SpeedZone^® EW Turf is ideal at this timing on weeds like ground ivy, clover, dandelion, and plantain.
• Poa Control in Warm-Season
  • Katana^® Turf Herbicide is great to combine with PRE herbicides (prodiamine, indaziflam, pronamide, simazine) for optimal control.
  • PRE+POST mixtures should be applied at an early-POST timing (October to December depending on location).
  • Katana^® + pronamide or Katana^® + Bensumec™ 4LF Pre-Emergent Grass & Weed Herbicide are great options for bermudagrass putting greens applied once or twice beginning when Poa first emerges.
• Cleaning Up Weeds Prior to Warm-Season Dormancy
  • Give warm-season turfgrasses the best chance to acclimate to winter dormancy by controlling weeds such as crabgrass, goosegrass, and broadleaf weeds.
  • SpeedZone^® EW, Avenue™ South, Katana^®, and Q4^® Plus are good solutions to consider for this application.

DISEASES

• Spring Dead Spot (SDS)
  • Kabuto^® Fungicide SC is the premium fungicide for control of spring dead spot (Golf, commercial, and residential).
  • >95% control is achieved with a single application of 3.2 fl. oz/1,000 sq. ft.
    • Application must be applied when 2” soil temperature is between 55-65°F.
    • Immediate post-application irrigation (>1/8”) is critical.
  • >95% control is achieved with two applications 1.0-1.6 fl. oz/1,000 sq. ft.
    • First application when 2” soil temperature is below 70°F.
    • Second application ~21 days after treatment (before 2” soil temp is < 60°F).
    • Immediate post-application irrigation (>1/8”) is critical.
• Take-All Root Rot (TARR)
  • Preventive application programs should be initiated late-summer.
  • Mefentrifluconazole and azoxystrobin are strong preventive fungicides (at high rates).
    • Immediate post-application irrigation (>1/8”) is critical.
• Dollar Spot
  • Fall dollar spot has been more damaging and more severe than early summer outbreaks in recent years; ensure timely fall applications have been applied preventively.
  • Tekken^® Broad Spectrum Fungicide provides excellent 21-28 day dollar spot control, and is ideal for large acreage applications.
• Tropical Storm Season and Disease Control
  • Gray Leaf Spot
    • Outbreaks are likely through September along the eastern seaboard.
    • Preventive applications with thiophanate-methyl, chlorothalonil, and prothioconazole.
  • Pythium Blight (and leaf spot) on bermudagrass greens
    • Preventive Segway^® Fungicide SC applications of 0.6 fl. oz/1,000 sq ft. on 14-day is industry leading.
    • Union^® Fungicide SC is ideal for control of Pythium Blight AND Bipolaris leaf spot.
  • Inclusion of a contact fungicide is also ideal when tropical systems are anticipated.

INSECTS

• White Grubs – CURATIVE Control
  • Curative applications for white grubs should be applied when grubs are first observed and are smaller in size.
    • Effective active ingredients include clothianidin, trichlorfon, and carbaryl.
    • Immediate post application irrigation of 0.1-0.2” is necessary for efficacy.
    • Applications resulting in >60% control of white grubs as a curative treatment would be considered successful.
• Annual Bluegrass Weevil (ABW) on the Move
  • ABW is moving farther west and south with significant establishment in northwest Ohio and Kentucky, as well as far south as north Georgia.
• Spotted Lantern Fly – ADULT Control
  • The active ingredient in Zylam^® Liquid Systemic Insecticide (dinotefuran) is highly effective for control of adult spotted lantern flies1, with adult death occurring in as little as 24-hr in treated trees2.
    • Optimal application method is by bark-banding, with rate determined by tree DBH.
    • Apply Zylam^® at the appropriate rate with an organosilicate surfactant.

*Follow the most restrictive of the labeling limitations and precautions of all products used in mixtures.

Avenue™, Arkon™ is a trademark of PBI-Gordon Corporation. Kabuto^®, SpeedZone^®, Union^®, Q4^®, Tekken^®, Zylam^® is a registered trademark of PBI-Gordon. Katana^® and Segway^® is a registered trademark of Ishihara Sangyo Kaisha, Ltd. 9/23 649418