Lawns Cultivation and inter-seeding Management of Alec Kowalewski - - PDF document

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Lawns Cultivation and inter-seeding Management of Alec Kowalewski - - PDF document

Dec 24, 2022 282 likes •422 views

3/19/2018 Lawns Primary Cultural Practices Mowing Fertilization Irrigation Lawns Cultivation and inter-seeding Management of Alec Kowalewski False dandelion Turfgrass Specialist Oregon State University White

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3/19/2018 1

Lawns

Alec Kowalewski Turfgrass Specialist Oregon State University alec.kowalewski@oregonstate.edu

  • Primary Cultural Practices
  • Mowing
  • Fertilization
  • Irrigation
  • Cultivation and inter-seeding
  • Management of…
  • False dandelion
  • White clover

Lawns Primary Cultural Practices

1. Mowing 2. Fertilizing 3. Irrigation

Primary Cultural Practices

Turfgrass

Primary Cultural Practices Primary Cultural Practices

Turfgrass

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3/19/2018 2

Primary Cultural Practices

Turfgrass

Primary Cultural Practices

MOWING

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3/19/2018 3

6” 4” 4.5” 3” 3” 2” 1.5” 1” Desired Mowing Height Mowing following 1/3 Rule

Mowing

  • The one-third rule

Mowing

  • The one-third rule

Mowing

  • The one-third rule
  • Prevent scalping
  • Scalping…
  • Causes a brown appearance
  • Stops growth and development
  • Depletes carbohydrates
  • Makes turf susceptible to environmental stress

Sunlight 4” Sunlight 3”

Mowing

  • The one-third rule
  • Prevent weed seed germination

Mowing

Sunlight Sunlight 4” 2”

  • The one-third rule
  • Prevent weed seed germination

Mowing

  • Raise your mowing height
  • Adhere to the one-third rule
  • Improve rooting
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3/19/2018 4

Mowing

  • Raise your mowing height
  • Prevent weed seed germination

Sunlight Sunlight 4” 2”

Mowing

  • Raise your mowing height
  • Raising the height from 1.5” to 3.0”
  • Improved turfgrass quality
  • Reduced weed populations
  • Crabgrass cover by up to 52%
  • Dandelion populations by up to 45%
  • White clover by up to 58%

Kentucky bluegrass, perennial ryegrass and fine fescue mixture

Mowing

35 days

  • Increase your mowing frequency
  • Adhere to the one-third rule
  • Increase turfgrass density
  • Weed control
  • Lambsquarter
  • Ragweed
  • Purslane
  • Garlic mustard

Mowing

42 days

  • Increase your mowing frequency
  • Adhere to the one-third rule
  • Increase turfgrass density
  • Weed control
  • Lambsquarter
  • Ragweed
  • Purslane
  • Garlic mustard

Mowing

49 days

  • Increase your mowing frequency
  • Adhere to the one-third rule
  • Increase turfgrass density
  • Weed control
  • Lambsquarter
  • Ragweed
  • Purslane
  • Garlic mustard

Mowing

  • Weeds that indicate your mowing height is to low…
  • Annual bluegrass
  • Crabgrass
  • Dandelion

Crabgrass Annual bluegrass

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3/19/2018 5

MOWING FERTILIZATION

Fertilization

  • Select a fertilizer designed for turfgrass
  • Primary nutrient (N-P-K)
  • High N
  • Low P
  • 10:1

Fertilization

  • The holiday plan
  • 3-5 lbs N 1000 ft2 year
  • Memorial day
  • 1.0-1.5 lbs N 1000 ft2
  • 4th of July
  • 0.5-1.0 lbs N 1000 ft2
  • Labor day
  • 0.5-1.0 lbs N 1000 ft2
  • Thanksgiving
  • 1.0-1.5 lbs 1000 ft2
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3/19/2018 6

Fertilization

  • The holiday plan
  • Cool-season turfgrass species
  • Kentucky bluegrass
  • Perennial ryegrass
  • Fine fescue
  • Tall fescue

Fertilization Fertilization

  • Low fertility weeds include…
  • White clover
  • Plantain
  • Black medic

White clover Plantain Black medic

FERTILIZATION IRRIGATION

Irrigation

  • Adjust your rates with the seasons
  • Spring
  • 0.0-0.75 inch week
  • Summer
  • 0.75-1.5 inch week
  • Fall
  • 0.0-0.75 inch week
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3/19/2018 7

Irrigation

  • Check your rates
  • 20 minutes
  • 0.1 inch
  • 0.25 inch
  • 0.5 inch
  • Conner Olsen – M.S. Candidate

September 1, 2016. The left photo is ¼” applied 4 x per week, and the right photo is 1” applied once a week starting July 4, 2016. ¼” applied 4 x week 1” applied once a week

OSU Turf Program Irrigation

  • Twice as much is not twice as good
  • Moss

Irrigation

  • Twice as much is not twice as good
  • Increased disease incidence

Dollar spot Pythium blight Brown patch

  • Twice as much is not twice as good
  • Leaching pesticides and fertilizers
  • Waste of water and money

Irrigation

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3/19/2018 8

  • Weeds associated with drought conditions…
  • Summer annuals
  • Knotweed
  • Wood sorrel
  • Crabgrass

Irrigation

Crabgrass Knotweed woodsorrel

Irrigation

  • Weeds associated with over irrigation…
  • Annual bluegrass
  • Rough bluegrass

Rough bluegrass Annual bluegrass

IRRIGATION

MARCH 31 – MOWED DAILY AUG 21 – MOWED DAILY

CULTIVATION & INTER-SEEDING

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3/19/2018 9

Cultivation

  • What is your objective when cultivating the turfgrass?

Cultivation

  • Objectives
  • Relive compaction
  • Improves gas exchange and drainage
  • Remove organic matter
  • Decreases potential for disease
  • Improves drainage
  • Prepare for seeding
  • Ensures seed to soil contact

Cultivation Cultivation Cultivation

  • Annual weeds
  • Pre-emergent herbicides
  • Non-selective
  • Pendulum (a.i. pendimethalin)
  • $54/54,000 sq ft
  • Selective
  • Tupersan (a.i. siduron)
  • Tenacity (a.i. mesotrione)
  • $98/54,000 sq ft
  • Inter-seeding
  • $1,440/54,000 sq ft
  • 600 lbs

Knotweed – Summer annual Fall – After 1st frost Non-selective pre-emergent herbicide. Applied in the spring. No inter-seeding.

Cultivation

  • Annual weeds
  • Pre-emergent herbicides
  • Non-selective
  • Pendulum (a.i. pendimethalin)
  • $54/54,000 sq ft
  • Selective
  • Tupersan (a.i. siduron)
  • Tenacity (a.i. mesotrione)
  • $98/54,000 sq ft
  • Inter-seeding
  • $1,440/54,000 sq ft
  • 600 lbs

Knotweed – Summer annual Fall – After 1st frost Non-selective pre-emergent herbicide. Applied in the spring. No inter-seeding.

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3/19/2018 10

Cultivation

  • Annual weeds
  • Pre-emergent herbicides
  • Non-selective
  • Pendulum (a.i. pendimethalin)
  • $54/54,000 sq ft
  • Selective
  • Tupersan (a.i. siduron)
  • Tenacity (a.i. mesotrione)
  • $98/54,000 sq ft
  • Inter-seeding
  • $1,440/54,000 sq ft
  • 600 lbs

Knotweed – Summer annual Fall – After 1st frost Non-selective pre-emergent herbicide. Applied in the spring. No inter-seeding. Caution label, but not on low-pact list

Inter-seeding

  • Perennial ryegrass
  • Growth habit
  • Bunch type
  • Germination
  • 7 to 10 days
  • Inter-seeding rate
  • 8 to 11 lbs/1,000 sq ft

CULTIVATION & INTER-SEEDING WEED MANAGEMENT

Weed Management

  • Common turf weeds…
  • 1. false dandelion
  • 2. white clover

False dandelion White clover

FALSE DANDELION

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3/19/2018 11

False dandelion

  • Scouting and ID
  • Perennial weed
  • Spring seeding
  • Drought tolerant

False dandelion

  • Post emergence herbicides (curative)
  • 3-way broadleaf herbicide
  • Trimec Classic
  • 2,4-D
  • MCPP
  • Dicamba

Common dandelion Broadleaf plantain Sow thistle False dandelion

False dandelion

  • Post emergence herbicides (curative)
  • 3 or 4 -way broadleaf herbicide
  • SpeedZone
  • 2,4-D
  • MCPP
  • Dicamaba
  • Carfentrazone

Common dandelion Broadleaf plantain Sow thistle False dandelion

  • Apply in the fall (October 4 = 10/4 Good Buddy)

False dandelion

  • Apply in the fall (October 4 = 10/4 Good Buddy)

False dandelion False dandelion

  • Follow up applications…
  • Apply and then apply again 2-4 weeks later
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3/19/2018 12

FALSE DANDELION WHITE CLOVER

White clover

  • Perennial weed
  • Nitrogen deficient soil
  • White flower
  • Circular leaves

White clover

  • Post emergence herbicides (curative)
  • Triclopyr
  • Weed B Gone Chickweed…
  • Triclopyr and 2,4-D
  • T Zone
  • Triclopyr
  • Sulfentrazone
  • 2,4-D
  • Dicamba

Chickweed English daisy Wild violet White clover

White clover

  • Post emergence herbicides (curative)
  • Triclopyr
  • Weed B Gone Chickweed…
  • Triclopyr and 2,4-D
  • T Zone
  • Triclopyr
  • Sulfentrazone
  • 2,4-D
  • Dicamba

Chickweed English daisy Wild violet White clover Nutsedge

  • Apply in the fall (October 4 = 10/4 Good Buddy)
  • Apply and then apply again 2-4 weeks later

False dandelion

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3/19/2018 13

WHITE CLOVER