Roots have a blackened vascular cylinder. fescue Type 2 or more characters into the input search below for suggested results, use up and down arrow keys to navigate through suggest box. Use this as an indicator of when to sharpen blades. If plants are infected, allow grass to undergo natural dormancy periods to reduce inoculum. From a distance, the patch may have a pinkish or reddish cast. Stand is slow to fill in. Therefore, select the tallest, acceptable mowing height for your species of grass and maintain that height during the entire season. 
Cooperative Extension is based at North Carolina's two land-grant institutions, Use fungicides on a preventive, rather than a curative, basis. Grasses can naturally recover from some diseases when environmental conditions favor growth of the turfgrass. Fungicide applications should begin again in the fall, when the nighttime temperatures drop into the 50s. drought Tufts appear as a dense cluster of yellow shoots, which can be seen arising out of a single axillary bud at the node or terminals of a stem. turf Diagnosis of lawn diseases can be performed at diagnostic clinics, such as the: Disease identification and control involve more than just waiting for diseases to appear, then trying to make a rapid diagnosis and applying a fungicide. Provide adequate water and air drainage. %PDF-1.4
%
Topical mode of action describes what happens to a fungicide when it contacts a plant. Spots are parallel to blade. Low light intensity (most severe on bluegrass in the shade).
0000021933 00000 n Follow label instructions. High nitrogen fertility and increased acid condition of soil are reported to help control. See listings for anthracnose in Table 2 PDF. 0000037881 00000 n This provides benefits throughout the season competition against weeds as well as reduced summer stress. 0000066427 00000 n managers pest turfgrass Turfgrass disease is one of the serious and costly reasons for injury and death to grasses used in lawns, golf courses, sport fields, and other areas where grasses are desired. Avoid excess nitrogen, moisture extremes and very close mowing. Grayish patches of wilted turf, 2 to 6 inches in diameter, appear first. Do not rely on fungicides alone. Avoid frequent irrigation that results in extended periods of free moisture. Avoid excess nitrogen and drought. Once the symptoms have developed, formation of the tuft cannot be reversed. Conditions favoring diseaseLow fertility, poor drainage, excess shade, soil compaction. p @1c%&>lf"0iOKt;CK%mPg\4^v|oeGk]XhYom^eu^/"nQ {6;r|SQ8eD`#KoSUPkVoFUdT~ "1`~cRy]fCMq>x,}L|{i^y|hI;#%01z+v$50qe|T )<>k. Light straw to bronzed color. JavaScript seems to be disabled in your browser.
Avoid excess nitrogen, especially in the spring. commitment to diversity. Conditions favoring diseaseTemperature 85 to 95 degrees Fahrenheit., summer to fall. Most fungicides must be applied in the fall before snow cover. microdochium tackling addressed occurs Snow cover is not necessary for development of this disease. Plant pathologists generally agree that certain practices can delay the selection of resistant fungal strains. Aerify to relieve compaction and promote deep root development. hydroseeding Provide good drainage when establishing a new seeding. Infected plants have poorly developed root systems, and die during stress periods. In later stages, fruiting bodies with black setae can be seen with a hand lens. High humidity. HostAll turfgrasses, but especially bentgrass. '9'F!~3>b8q|bY\ -dE'2p&] %o0 M
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No resistant varieties. Infected bentgrass often takes on an orange cast. Usually a problem after turf growth has been slowed by moisture stress. For the best experience on our site, be sure to turn on Javascript in your browser. Updated annually, this is a valuable resource for the North Carolina turfgrass industry, extension agents, and other professionals who maintain athletic fields, golf courses, lawns, parks, and other landscapes that feature turfgrass.
An area historically prone to summer patch disease can be planted to tall fescue to reduce that potential. Use contact fungicides alone or in combination with systemics as part of the control program. On putting greens where the disease occurs in association with Poa annua, manage out the Poa or, when the budget allows, replace it with bentgrass. For example, summer patch is a severe problem on Kentucky bluegrass but has little effect on tall fescue. I#S$ "t1d`dJ`(Ndh!!-. You can also increase light penetration and air movement by selectively pruning your trees and shrubs. Conditions favoring diseaseTemperature 85 to 95 degrees Fahrenheit. Not usually serious in Missouri. A rule of thumb is to avoid puddles and runoff during irrigation, put the water where it is needed, and irrigate only as much as your particular soil type can absorb in one cycle. i& endstream endobj 2252 0 obj <>/Metadata 144 0 R/Pages 140 0 R/StructTreeRoot 146 0 R/Type/Catalog/ViewerPreferences<>>> endobj 2253 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/Type/Page>> endobj 2254 0 obj <> endobj 2255 0 obj <> endobj 2256 0 obj [/ICCBased 2261 0 R] endobj 2257 0 obj <>stream Leaf blades tinted pink. Systemic fungicides can be subdivided based on the extent of movement inside the plant. A dull mower blade inflicts more and bigger wounds that increase potential for infection by turfgrass diseases. Excess thatch. Observe leaf tips or grass clippings collected on your mower deck immediately after a mowing to determine the quality of cut. The disease is difficult to control once symptoms are noted. See labels for recommended rates and time of application. Fungicides applied to control other diseases should keep slime molds in check. The risk of selecting resistant fungal strains is low for a fungicide that affects multiple sites under regulation by multiple genes. A diagnosis of the cause of damping off will help you decide which materials to use. qdn^_| `!0?^gY 5cDAL\A7;f 'p2N!B"RJ&(Fdxm!p~"0zZ\u{;4?D;9v&vz2IaXD$p! Avoid the use of DMI-type fungicides during summer heat stress periods. A good exchange of air between the soil and atmosphere is necessary for vigorous turfgrass growth. Time of year: October through November. Read our Yellow to orange appearance to zoysia; patch margins with distinct bright yellow-orange leaves. HostAnnual bluegrass, Kentucky bluegrass, tall fescue, fine-leaf fescue, perennial ryegrass, roughstalk bluegrass, creeping bentgrass, zoysiagrass. Core aerification (removing soil plugs) is a slower process of thatch control but will cause less direct stress on the turf. Remove excess thatch when it accumulates to a half inch or more in taller-mowed turf (1.5 to 4 inches) and one-quarter inch in lower-mowed turf (less than 1.5 inches). Large, circular areas of zoysia or buffalograss that fail to green up in the spring. Conditions favoring diseaseTemperature: wide range. Aerify compacted soils to improve drainage. When anthracnose basal rot has been identified, suspend management practices, such as topdressing and aerification that injure plants. Some fungicides interfere with a single action site while others affect multiple action sites.
Type III: Circular ring of basidiocarps (mushrooms or puffballs) with no visible effect on the grass. Correct nitrogen deficiency. Moderate soil moisture stress, heavy dew and frequent light rain. Cooperative Extension prohibits discrimination and harassment regardless of age, color, disability, family and marital status, gender identity, national origin, political beliefs, race, religion, sex (including pregnancy), sexual orientation and veteran status. There are several fungicides labeled for control of fairy ring. A second application in the spring may be desirable. Light-green to yellow-green, or bronze-colored rings and crescent-shaped patches, ranging from a few inches to about 3 feet in diameter, often with green grass in the center of the circles. Frequency of cut should be determined by the "one-third rule" of mowing. High nitrogen fertility, heavy thatch. Suppression often lasts long enough to allow prevailing environmental conditions to become more favorable for growth and recovery of the turfgrass. In well-maintained turf areas of Kentucky bluegrass, consider an early spring preventive application of a DMI-type fungicide. Click for a hub of Extension resources related to the current COVID-19 situation. Patches of turf that have stunted or yellow grass. Heavily used areas subject to compaction. FOR USE ONLY ON GOLF COURSES, CEMETERIES AND INDUSTRIAL GROUNDS. This disease appears first as an area of water-soaked tissue that turns light brown as the leaf tissue dies. Compacted soil. A cultivar of Kentucky bluegrass may show a higher level of tolerance to rust disease and perhaps be selected as part of a blend or mixture. Thanks to the work of the Fungicide Resistance Action Committee (FRAC), a turfgrass manager does not need to know the exact biochemical mode of action for a given fungicide. Remove excess thatch when it reaches 0.5 inch. diseases pests friend replay 0000066194 00000 n Most of the data and information generated by this program can be accessed through their website. Plant pathogenic fungi are the main cause of lawn diseases. Excess thatch. Conditions favoring diseaseSpring, summer, fall. Refer to Table 1 for host species, disease symptoms, conditions favorable for infection and recommended cultural practices and fungicide treatments. Cool-season grasses can be allowed to have drying periods (near wilting) to disrupt the growth cycle of fungi favored by free moisture. This will speed the drying of poorly drained areas and also reduce the humidity in localized turf areas. Maintain balanced fertility.
Cultivars with a high level of winter hardiness are less affected by spring dead spot. Preventative measures are better than curative. Shade poor air circulation. Avoid excessive water and watering. Conditions favoring diseaseLow, wet locations. Maintain balanced fertility. Nearly all turfgrass diseases require water for their development. The committee has assigned number or letter codes to commercial fungicides, grouping them according to mode of action. Apply 2 to 3 ounces of copper sulfate per 1,000 square feetSome mancozeb and chlorothalonil formulations are labeled for control of algae. Find more information at the following NC State Extension websites: Publication date: Jan. 4, 2022 Conditions favoring diseaseUnder conditions of high humidity and high temperature (80 to 90 degrees Fahrenheit), the disease may develop rapidly. Conditions favoring diseaseAttacks are most severe in warm weather on heavy, poorly drained soils or where seeding rates have been excessive. Remove thatch in the spring before application of crabgrass preventer, or in the fall for cool-season grasses and midsummer for warm-season grasses. It is excellent habitat for active and dormant stages of disease-causing organisms. Some diseases can be avoided by selecting grass species that are not susceptible to certain pathogens. Applications need to begin following the first mowing in the spring and continue until the nighttime temperatures remain above 65 degrees Fahrenheit on a consistent basis. Apply Nemacur 10G Turf and Ornamental Nematicide (2.33 pounds per 1,000 square feet). Low fertility. HostAll turfgrasses are host to one or more of these pathogens. Patches showing up same places year after year with or without other obvious diseases should be assayed for nematodes. 0000070490 00000 n Thatch is a layer of dead and living plant material located between the soil surface and green turf canopy.
Cooperative Extension is based at North Carolina's two land-grant institutions, Use fungicides on a preventive, rather than a curative, basis. Grasses can naturally recover from some diseases when environmental conditions favor growth of the turfgrass. Fungicide applications should begin again in the fall, when the nighttime temperatures drop into the 50s. drought Tufts appear as a dense cluster of yellow shoots, which can be seen arising out of a single axillary bud at the node or terminals of a stem. turf Diagnosis of lawn diseases can be performed at diagnostic clinics, such as the: Disease identification and control involve more than just waiting for diseases to appear, then trying to make a rapid diagnosis and applying a fungicide. Provide adequate water and air drainage. %PDF-1.4
%
Topical mode of action describes what happens to a fungicide when it contacts a plant. Spots are parallel to blade. Low light intensity (most severe on bluegrass in the shade). 
0000021933 00000 n Follow label instructions. High nitrogen fertility and increased acid condition of soil are reported to help control. See listings for anthracnose in Table 2 PDF. 0000037881 00000 n This provides benefits throughout the season competition against weeds as well as reduced summer stress. 0000066427 00000 n managers pest turfgrass Turfgrass disease is one of the serious and costly reasons for injury and death to grasses used in lawns, golf courses, sport fields, and other areas where grasses are desired. Avoid excess nitrogen, moisture extremes and very close mowing. Grayish patches of wilted turf, 2 to 6 inches in diameter, appear first. Do not rely on fungicides alone. Avoid frequent irrigation that results in extended periods of free moisture. Avoid excess nitrogen and drought. Once the symptoms have developed, formation of the tuft cannot be reversed. Conditions favoring diseaseLow fertility, poor drainage, excess shade, soil compaction. p @1c%&>lf"0iOKt;CK%mPg\4^v|oeGk]XhYom^eu^/"nQ {6;r|SQ8eD`#KoSUPkVoFUdT~ "1`~cRy]fCMq>x,}L|{i^y|hI;#%01z+v$50qe|T )<>k. Light straw to bronzed color. JavaScript seems to be disabled in your browser.
Avoid excess nitrogen, especially in the spring. commitment to diversity. Conditions favoring diseaseTemperature 85 to 95 degrees Fahrenheit., summer to fall. Most fungicides must be applied in the fall before snow cover. microdochium tackling addressed occurs Snow cover is not necessary for development of this disease. Plant pathologists generally agree that certain practices can delay the selection of resistant fungal strains. Aerify to relieve compaction and promote deep root development. hydroseeding Provide good drainage when establishing a new seeding. Infected plants have poorly developed root systems, and die during stress periods. In later stages, fruiting bodies with black setae can be seen with a hand lens. High humidity. HostAll turfgrasses, but especially bentgrass. '9'F!~3>b8q|bY\ -dE'2p&] %o0 M
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No resistant varieties. Infected bentgrass often takes on an orange cast. Usually a problem after turf growth has been slowed by moisture stress. For the best experience on our site, be sure to turn on Javascript in your browser. Updated annually, this is a valuable resource for the North Carolina turfgrass industry, extension agents, and other professionals who maintain athletic fields, golf courses, lawns, parks, and other landscapes that feature turfgrass. 
An area historically prone to summer patch disease can be planted to tall fescue to reduce that potential. Use contact fungicides alone or in combination with systemics as part of the control program. On putting greens where the disease occurs in association with Poa annua, manage out the Poa or, when the budget allows, replace it with bentgrass. For example, summer patch is a severe problem on Kentucky bluegrass but has little effect on tall fescue. I#S$ "t1d`dJ`(Ndh!!-. You can also increase light penetration and air movement by selectively pruning your trees and shrubs. Conditions favoring diseaseTemperature 85 to 95 degrees Fahrenheit. Not usually serious in Missouri. A rule of thumb is to avoid puddles and runoff during irrigation, put the water where it is needed, and irrigate only as much as your particular soil type can absorb in one cycle. i& endstream endobj 2252 0 obj <>/Metadata 144 0 R/Pages 140 0 R/StructTreeRoot 146 0 R/Type/Catalog/ViewerPreferences<>>> endobj 2253 0 obj <>/Font<>/ProcSet[/PDF/Text]>>/Rotate 0/Type/Page>> endobj 2254 0 obj <> endobj 2255 0 obj <> endobj 2256 0 obj [/ICCBased 2261 0 R] endobj 2257 0 obj <>stream Leaf blades tinted pink. Systemic fungicides can be subdivided based on the extent of movement inside the plant. A dull mower blade inflicts more and bigger wounds that increase potential for infection by turfgrass diseases. Excess thatch. Observe leaf tips or grass clippings collected on your mower deck immediately after a mowing to determine the quality of cut. The disease is difficult to control once symptoms are noted. See labels for recommended rates and time of application. Fungicides applied to control other diseases should keep slime molds in check. The risk of selecting resistant fungal strains is low for a fungicide that affects multiple sites under regulation by multiple genes. A diagnosis of the cause of damping off will help you decide which materials to use. qdn^_| `!0?^gY 5cDAL\A7;f 'p2N!B"RJ&(Fdxm!p~"0zZ\u{;4?D;9v&vz2IaXD$p! Avoid the use of DMI-type fungicides during summer heat stress periods. A good exchange of air between the soil and atmosphere is necessary for vigorous turfgrass growth. Time of year: October through November. Read our Yellow to orange appearance to zoysia; patch margins with distinct bright yellow-orange leaves. HostAnnual bluegrass, Kentucky bluegrass, tall fescue, fine-leaf fescue, perennial ryegrass, roughstalk bluegrass, creeping bentgrass, zoysiagrass. Core aerification (removing soil plugs) is a slower process of thatch control but will cause less direct stress on the turf. Remove excess thatch when it accumulates to a half inch or more in taller-mowed turf (1.5 to 4 inches) and one-quarter inch in lower-mowed turf (less than 1.5 inches). Large, circular areas of zoysia or buffalograss that fail to green up in the spring. Conditions favoring diseaseTemperature: wide range. Aerify compacted soils to improve drainage. When anthracnose basal rot has been identified, suspend management practices, such as topdressing and aerification that injure plants. Some fungicides interfere with a single action site while others affect multiple action sites.
Type III: Circular ring of basidiocarps (mushrooms or puffballs) with no visible effect on the grass. Correct nitrogen deficiency. Moderate soil moisture stress, heavy dew and frequent light rain. Cooperative Extension prohibits discrimination and harassment regardless of age, color, disability, family and marital status, gender identity, national origin, political beliefs, race, religion, sex (including pregnancy), sexual orientation and veteran status. There are several fungicides labeled for control of fairy ring. A second application in the spring may be desirable. Light-green to yellow-green, or bronze-colored rings and crescent-shaped patches, ranging from a few inches to about 3 feet in diameter, often with green grass in the center of the circles. Frequency of cut should be determined by the "one-third rule" of mowing. High nitrogen fertility, heavy thatch. Suppression often lasts long enough to allow prevailing environmental conditions to become more favorable for growth and recovery of the turfgrass. In well-maintained turf areas of Kentucky bluegrass, consider an early spring preventive application of a DMI-type fungicide. Click for a hub of Extension resources related to the current COVID-19 situation. Patches of turf that have stunted or yellow grass. Heavily used areas subject to compaction. FOR USE ONLY ON GOLF COURSES, CEMETERIES AND INDUSTRIAL GROUNDS. This disease appears first as an area of water-soaked tissue that turns light brown as the leaf tissue dies. Compacted soil. A cultivar of Kentucky bluegrass may show a higher level of tolerance to rust disease and perhaps be selected as part of a blend or mixture. Thanks to the work of the Fungicide Resistance Action Committee (FRAC), a turfgrass manager does not need to know the exact biochemical mode of action for a given fungicide. Remove excess thatch when it reaches 0.5 inch. diseases pests friend replay 0000066194 00000 n Most of the data and information generated by this program can be accessed through their website. Plant pathogenic fungi are the main cause of lawn diseases. Excess thatch. Conditions favoring diseaseSpring, summer, fall. Refer to Table 1 for host species, disease symptoms, conditions favorable for infection and recommended cultural practices and fungicide treatments. Cool-season grasses can be allowed to have drying periods (near wilting) to disrupt the growth cycle of fungi favored by free moisture. This will speed the drying of poorly drained areas and also reduce the humidity in localized turf areas. Maintain balanced fertility.
Cultivars with a high level of winter hardiness are less affected by spring dead spot. Preventative measures are better than curative. Shade poor air circulation. Avoid excessive water and watering. Conditions favoring diseaseLow, wet locations. Maintain balanced fertility. Nearly all turfgrass diseases require water for their development. The committee has assigned number or letter codes to commercial fungicides, grouping them according to mode of action. Apply 2 to 3 ounces of copper sulfate per 1,000 square feetSome mancozeb and chlorothalonil formulations are labeled for control of algae. Find more information at the following NC State Extension websites: Publication date: Jan. 4, 2022 Conditions favoring diseaseUnder conditions of high humidity and high temperature (80 to 90 degrees Fahrenheit), the disease may develop rapidly. Conditions favoring diseaseAttacks are most severe in warm weather on heavy, poorly drained soils or where seeding rates have been excessive. Remove thatch in the spring before application of crabgrass preventer, or in the fall for cool-season grasses and midsummer for warm-season grasses. It is excellent habitat for active and dormant stages of disease-causing organisms. Some diseases can be avoided by selecting grass species that are not susceptible to certain pathogens. Applications need to begin following the first mowing in the spring and continue until the nighttime temperatures remain above 65 degrees Fahrenheit on a consistent basis. Apply Nemacur 10G Turf and Ornamental Nematicide (2.33 pounds per 1,000 square feet). Low fertility. HostAll turfgrasses are host to one or more of these pathogens. Patches showing up same places year after year with or without other obvious diseases should be assayed for nematodes. 0000070490 00000 n Thatch is a layer of dead and living plant material located between the soil surface and green turf canopy.