turfgrass. uneven fertilization fertilizer injury management problems
TRANSCRIPT
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TurfgrassTurfgrass
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Uneven fertilization
Fertilizer injury
Management ProblemsManagement Problems
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Dog urine
Drought
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Bird damage
Dull mower blade
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Insect ProblemsInsect Problems
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Sod WebwormCT: 150-500 per square foot1 year life cycle (1 to 3 generations)Control: beneficial nematodes (Scanmask)
Sevin, Spinosad, Merit, MACH 2, TempoBacillus thuringiensis (BT)
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BillbugCT: 30 – 50 per square ftOne year life cycleControl: beneficial nematodes
Sevin, Diazinon,MACH 2 (for larvae)Merit
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Black Turfgrass AtaeniusLife cycle: one to two generations per yearCT: 8 - 20 per square footControl: beneficial nematodes (Scanmask or Cruiser)
Sevin, Merit, MACH 2, Bt
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May/June BeetleCT: 3-4 per square footLife cycle: 1 to 4 yearsControl: Sevin, Merit, MACH 2
nemotodes (Scanmask, Cruiser), Bt
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Disease Disease ProblemsProblems
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Pink Snow Mold (Fusarium nivalis)• Avoid heavy fall fertilization• Avoid heavy snow accumulation when shoveling snow• Apply fungicides to affected areas in fall
and early spring
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Gray Snow Mold (Typhuyla sp.)
• Avoid heavy snow accumulation when shoveling snow• Spread snow or apply black fly ash or graphite• Apply fungicides to affected areas in late fall
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Melting out (Helminthosporium sp.)
• Aerate to reduce thatch in early spring• Avoid single heavy nitrogen application in spring• Water deeply and infrequently
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Necrotic Ring Spot(Leptosphaeria korrae)
• Aerate to reduce thatch in
early spring• Nitrogen fertilizer applied
frequently at low rates• Deep, infrequent water• Mow 2.5 to 3 inches• Replant with resistant varieties
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Summer Patch(Magnaporthe graminicola)
• Aerate to reduce thatch in
early spring• Nitrogen fertilizer applied
frequently at low rates• Deep, infrequent water• Mow 2.5 to 3 inches• Replant with resistant varieties
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Fairy Ring (Basidiomycete sp.)
• Fertilize adequately to mask effects of disease• Aerate to improve water penetration in rings• Prostar fungicide provides suppression
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Powdery Mildew (Erysiphe graminis)
• Don’t plant in heavy shade, or use shade varieties• Water deeply and infrequently• Apply fungicides where there’s a history of mildew
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Weed Weed ProblemsProblems
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Black medic (Medicago lupulina)
• Apply postemergence broadleaf herbicides during periods of active growth from late spring through early summer and again from early through mid-autumn (dicamba, triclopyr)
• Hand pull
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Dandelion (Taraxacum officinale)
• Apply postemergence broadleaf herbicides
from early through mid-autumn (all broadleaf herbicides)
• Hand dig, include complete root
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Knotweed(Polygonum supina)
• Apply postemergencebroadleaf herbicides in spring (dicamba, triclopyr), pre-emergent herbicides when forsythia bloom
• Hand pull
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Prostrate spurge (Euphorbia spp.)
• Apply postemergencebroadleaf herbicides in spring (triclopyr), pre-emergent herbicides when
forsythia bloom• Hand pull
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White Clover(Trifolium repens)
• Apply postemergencebroadleaf herbicides in mid-spring to early summer and/or mid to late fall when actively growing (dicamba, triclopyr)• Maintain turf density and health through proper culture. Do not fertilize heavily with phosphorus.
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Henbit(Lamium amplexicaule)
• Maintain turf density and health through proper culture, avoid seeding in fall; hoe or hand pull• Apply postemergence herbicides from mid through
late spring and again from mid to late autumn. Preemergence herbicides should be applied in late summer before germination.
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Plantain(Plantago major,or lanceolata)
• very tolerant of harsh compacted, wet or dry conditions
• physically remove short, tough root system when the soil is moist
• Apply herbicides spring or fall (combination of 2,4-D &/or MCPP, dicamba, triclopyr, clopyralid)
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Musk Thistle(Carduus nutans)
• low maintenance areas and roadsides
• biennial, reproduction by seed• consistent mowing and good
nitrogen fertilization create competitive turf
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Wild violet(Viola papilionacea)
• colonize shaded, well fertilized, moist areas and easily out-compete cool-season turf
• hand digging of small clumps can be very effective if the entire root system is removed.
• Herbicides have limited effectiveness (combination product repeatedly applied beginning in May)
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Annual weedy grasses
• preemergent control applied 2 weeks prior to germination (soil temp = 55º to 58º for several consecutive days)