Lawns. Alec Kowalewski Turfgrass Specialist Oregon State University

Transcription

1 Lawns Alec Kowalewski Turfgrass Specialist Oregon State University

2 Background Master of Science (2003 to 2006) Crop and Soil Science Turfgrass Management Leaf litter disposal as an organic weed control method

3 Background Ph.D. (2006 to 2010) Crop and Soil Science Turfgrass Management Cost effective athletic field renovation process

4 Background Operational Consultant 2008 Olympic Games Beijing, China

5 Background August 2010 to Dec 2012 Assistant Professor Environmental Horticulture Abraham Baldwin Agricultural College Tifton, GA

6 Background Summer employment University of Georgia Turfgrass Breeding Program Research Scientist

7 Background Dec 2012 Turfgrass Specialist Oregon State University

8 Beaver Turf Update Register for our newsletter Beaver Turf News: New Faces at OSU

9 Lawns Alec Kowalewski Turfgrass Specialist Oregon State University

10 Benefits of Turfgrass

11 Benefits of Turfgrass Erosion control

12 Benefits of Turfgrass Erosion control Reduced surface runoff

13 Benefits of Turfgrass Erosion control Reduced surface runoff Enhances water recharge

14 Benefits of Turfgrass Erosion control Reduced surface runoff Enhances water recharge Carbon sequestration

15 Benefits of Turfgrass Erosion control Reduced surface runoff Enhances water recharge Carbon sequestration Temperature moderation

16 Benefits of Turfgrass Erosion control Reduced surface runoff Enhances water recharge Carbon sequestration Temperature moderation Line of sight

17 Benefits of Turfgrass Erosion control Reduced surface runoff Enhances water recharge Carbon sequestration Temperature moderation Line of sight Fire barrier

18 Benefits of Turfgrass Erosion control Reduced surface runoff Enhances water recharge Carbon sequestration Temperature moderation Line of sight Fire barrier Recreation

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

20 Primary Cultural Practices 1. Mowing 2. Fertilizing 3. Irrigation

21 Primary Cultural Practices

22 Primary Cultural Practices Turfgrass

23 Primary Cultural Practices Turfgrass

24 Primary Cultural Practices

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26 Primary Cultural Practices Turfgrass

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28 MOWING

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30 Desired Mowing Height Mowing following 1/3 Rule Mowing The one-third rule

31 Mowing The one-third rule

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

33 Mowing The one-third rule Prevent weed seed germination Sunlight Sunlight 4 3

34 Mowing The one-third rule Prevent weed seed germination Sunlight Sunlight 4 2

35 Mowing Raise your mowing height Adhere to the one-third rule Improve rooting

36 Mowing Raise your mowing height Prevent weed seed germination Sunlight Sunlight 4 2

37 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

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

39 Mowing Increase your mowing frequency Adhere to the one-third rule Increase turfgrass density Weed control Lambsquarter Ragweed Purslane Garlic mustard 35 days

40 Mowing Increase your mowing frequency Adhere to the one-third rule Increase turfgrass density Weed control Lambsquarter Ragweed Purslane Garlic mustard 42 days

41 Mowing Increase your mowing frequency Adhere to the one-third rule Increase turfgrass density Weed control Lambsquarter Ragweed Purslane Garlic mustard 49 days

42 Mowing Weeds that indicate your mowing height is to low Annual bluegrass Crabgrass Dandelion Annual bluegrass Crabgrass

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44 MOWING

45 FERTILIZATION

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

47 Fertilization The holiday plan 3-5 lbs N 1000 ft2 year Memorial day lbs N 1000 ft2 4th of July lbs N 1000 ft2 Labor day lbs N 1000 ft2 Thanksgiving lbs 1000 ft2

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

49 Fertilization

50 Fertilization Low fertility weeds include White clover Plantain Black medic White clover Black medic Plantain

51 FERTILIZATION

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53 IRRIGATION

54 Irrigation Adjust your rates with the seasons Spring inch week Summer inch week Fall inch week

55 Irrigation Check your rates 20 minutes 0.1 inch 0.25 inch 0.5 inch

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57 Irrigation Twice as much is not twice as good Moss

58 Irrigation Twice as much is not twice as good Increased disease incidence Dollar spot Pythium blight Brown patch

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

60 Irrigation Weeds associated with drought conditions Summer annuals Knotweed Wood sorrel Crabgrass Crabgrass Knotweed woodsorrel

61 Irrigation Weeds associated with over irrigation Annual bluegrass Rough bluegrass Rough bluegrass Annual bluegrass

62 IRRIGATION

63 CULTIVATION & INTER-SEEDING

64 Cultivation What is your objective when cultivating the turfgrass?

65 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

66 Cultivation

67 Cultivation

68 Cultivation Non-selective pre-emergent herbicide. Applied in the spring. No inter-seeding. 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 Knotweed Summer annual Inter-seeding $1,440/54,000 sq ft 600 lbs Fall After 1 st frost

69 Cultivation Non-selective pre-emergent herbicide. Applied in the spring. No inter-seeding. 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 Knotweed Summer annual Inter-seeding $1,440/54,000 sq ft 600 lbs Fall After 1 st frost

70 Cultivation Non-selective pre-emergent herbicide. Applied in the spring. No inter-seeding. 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 Knotweed Summer annual Inter-seeding $1,440/54,000 sq ft 600 lbs Caution label, but not on low-pact list Fall After 1 st frost

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

72 CULTIVATION & INTER-SEEDING

73 WEED MANAGEMENT

74 Weed Management Common turf weeds 1. false dandelion 2. white clover 5. annual bluegrass False dandelion White clover Annual bluegrass

75 FALSE DANDELION

76 False dandelion Scouting and ID Perennial weed Spring seeding Drought tolerant

77 False dandelion Post emergence herbicides (curative) 3-way broadleaf herbicide Trimec Classic 2,4-D MCPP Dicamba False dandelion Common dandelion Broadleaf plantain Sow thistle

78 False dandelion Post emergence herbicides (curative) 3 or 4 -way broadleaf herbicide SpeedZone 2,4-D MCPP Dicamaba Carfentrazone False dandelion Common dandelion Broadleaf plantain Sow thistle

79 False dandelion Apply in the fall (October 4 = 10/4 Good Buddy)

80 False dandelion Apply in the fall (October 4 = 10/4 Good Buddy)

81 False dandelion Follow up applications Apply and then apply again 2-4 weeks later

82 FALSE DANDELION

83 WHITE CLOVER

84 White clover Perennial weed Nitrogen deficient soil White flower Circular leaves

85 White clover Post emergence herbicides (curative) Triclopyr Weed B Gone Chickweed Triclopyr and 2,4-D T Zone Triclopyr Sulfentrazone 2,4-D Dicamba White clover Chickweed English daisy Wild violet

86 White clover Post emergence herbicides (curative) Triclopyr Weed B Gone Chickweed Triclopyr and 2,4-D T Zone Triclopyr Sulfentrazone 2,4-D Dicamba Nutsedge White clover Chickweed English daisy Wild violet

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

88 WHITE CLOVER