Brown Patch

Read: How to spot Brown Patch

Brown Patch (also called Rhizoctonia blight) is a disease most common to Bermuda, Kentucky Bluegrass, Centipede Grass, Bentgrass, St. Augustine, and ryegrasses in regions with high humidity and/or shade. Brown patch commonly starts as a small spot and can quickly spread outwards in a circular or horseshoe pattern up to a couple of feet wide. Often times, while expanding outwards, the inside of the circle will recover, leaving the brown areas resembling a smoke-ring. Brown patch can temporarily harm a lawn's appearance and cause permanent loss of grass plants that are less than 1 year old.

Brown patch is a fungal disease that presents a serious threat to St. Augustine each spring and fall. With the onset of cooler temperatures, wet and overcast conditions, brown patch presents a challenge to St. Augustine lawns.

Conditions most favorable for brown patch development include (1) the presence of active fungi, (2) vigorous growth of a susceptible grass, (3) daytime temperatures ranging between 75 — 85, (4) the presence of free moisture on the foliage, and (5) night temperatures falling below 68.

Symptoms

On warm season turf grasses, the disease is characterized by at least two different types of symptoms. The most common is a circular pattern of brown grass with a yellowish ring (smoke ring) of wilted grass on the perimeter of the diseased area. The leaves can be easily pulled from the stolons with the smoke ring because the fungus destroys the tissue at the base of the leaf.

Symptoms first appear as small circular patches of water-soaked, dark grass that soon wilt and turn light brown. Stolons often remain green as the disease develops, the circular patches enlarge, smoke-rings become apparent and new green leaves may emerge in the center of the circular areas.

Control

When environmental conditions are favorable, brown patch is likely to develop on susceptible turf grasses. The severity of the disease can be somewhat controlled by following a strict fertilization schedule that only apply the proper amount of nitrogen and trace elements during the ideal times; by watering early in the morning to remove dew and all the grass to dry quickly; mow grass a little taller with a sharp mower blade, and when possible, by bagging the lawn clippings during likely periods of disease activity. Fungicide applications are most effective when used as a preventative before the disease has become established in the lawn.

Prevention

Brown Patch disease The best prevention for brown patch is to aerate often, reduce shade to effected areas, and follow a fertilization schedule to help prevent fertilization with excess amounts of nitrogen.

Treatment

The most common fungicides used on Brown Patch are: benomyl, chlorothalonil and Armada fungicide (a professionally applied product). Brown patch controls with fungicides containing thiophanate-methyl and/or chlorothalonil become ineffective as temperatures exceed 90°F. Other fungicides containing mancozeb, myclobutanil, propiconazole, quintozene, thiram, or triadimefon may also be used.


Expand All \| Collapse All Problems Animal Problems Animals Armadillos Deer Deer Plantings Dogs Dog Problems Dog Diet Dog Prevention Using Gypsum Geese Gophers Gopher Trapping Groundhogs / Woodchuck Moles Skunks Squirrels Diseases Diseases Identifying Diseases Disease Chart Prevention Bacterial Diseases Fungal Diseases Viruses Brownpatch Brownpatch ID Dollarspot Fairy Ring Fusarium Grayleaf Grease Spot Hosta Virus Leaf Smut Leaf Spot Powdery Mildew Pythium Red Thread Rust SAD Snowmold Summerpatch Insects Turf Insects Ornamental Insects Monitoring Activity Aphids Armyworms Bees Billbugs Centipede Caterpillars Chinchbugs Crane Fly Cutworms Earthworms Earwigs Fire ants Flys Galls Grubs Japanese Beetle Millipedes Molecrickets Mosquitos Nematodes Bad Slugs Snails Sodwebworms Sowbugs Ticks Tick Removal Lyme Disease R.M. Spotted Fever Webworms Woolly Adelgid Insect Controls Insect Detection Chemical Insect Controls Biological Insect Controls Cultural Insect Controls Manual Insect Control Merit Grub Control Milky Spore Soil Problems Urban Soils Compaction Dethatch Droughts Floods Over Watering Thatch Top Dressing Weeds Weeds Weed Identification Weed Photo ID Soil Problems Grassy Weeds Grassy Weeds Annual Bluegrass Barnyardgrass Bentgrass Bermudagrass Crabgrass Dallisgrass Fall Panicum Foxtails Goosegrass Johnsongrass Nimblewill Quackgrass Grass-like Weeds Grass-like Wild Garlic/Onion Star of Bethlehem Yellow Nutsedge Broadleaf Weeds Broadleafs Buckhorn Plantain Carolina Geranium Carpetweed Chickweed Creeping Beggarweed Curly Dock Dandelions Henbit Horsenettle Ground Ivy Lambsquarters Plantain Ragweed White Clover Wild Violets Wood Sorrel Edible Weeds Moss Mushrooms Sandbur Speedwell Spurge Weed Controls Weed Controls Pre-emergent Post-emergent IPM Biological Controls Chemical Controls Botanical Controls Mechanical Controls Spot Controls Cultural Controls Organic Controls Noxious Weeds Noxious Thistle Hogweed Horsenettle Poison Ivy Poison Ivy Rash Poison Oak Poison Sumac Quackgrass Enter your ZipCode below to find a professional in your area.	Home Landscapes Gardens Lawns Problems Problems in the Landscape Animals Animals Armadillos Deer Deer Plantings Dogs Dog Spots Dog Diet Dog Spot Prevention Using Gypsum Geese Gophers Gopher Trapping Groundhogs Moles Skunks Squirrels Diseases Diseases Identify Disease Chart Prevention Bacterial Fungal Viruses Brownpatch Brownpatch ID Dollarspot Fairyring Fusarium Grayleaf Greasespot Hosta Virus Leafsmut Leafspot Powdery mildew Pythium Red thread Rust St. Augustine Decline Snowmold Summerpatch Insects Insects Turf Insects Detection Ornament Insects Aphids Armyworms Bees Billbugs Caterpillars Centipede Chinchbugs Crane Flys Cutworms Earthworms Earwigs Fire ants Galls Grubs Japanese Beetle Millipedes Molecrickets Mosquitos Nematodes Bad Slugs Snails Sodwebworms Sowbugs Ticks Tick Removal Lyme Disease Rocky Mountain Spotted Fever Webworms Woolly Adelgid Insect Controls Chemical Biological Cultural Monitoring Manual Merit Milky Spore Soils Soil Problems Urban Soil Problems Compaction Dethatching Lawns Droughts Floods Over water Thatch Topdress Weeds Common Weeds Grass-like Weeds Grassy-type Weeds Broadleaf Weeds Annual Bluegrass Barnyardgrass Bentgrass Bermudagrass Star of Bethlehem Buckhorn Plantain Carpetweed Chickweed White Clover Crabgrass Creeping Beggarweed Dallisgrass Dandelions Curly Dock Edible Weeds Foxtails Wild Garlic Carolina Geranium Goosegrass Henbit Horsenettle Ground Ivy Johnsongrass Lambsquarters Moss Mushrooms Nimblewill Nutsedge Panicum Plantain Quackgrass Ragweed Sandbur Soil Problems Speedwell Spurge Wild Violets Weed Index Woodsorrel Weed Identification Identification Photo Id Weed Controls Controls Pre emergent Post emergent Spot Chemical Mechanical Biological Botanical Cultural Corngluten IPM Noxious Weeds Canadian Thistle Hogweed Horsenettle Poison Ivy Poison Ivy Exposure Poison Oak Poison Sumac Quackgrass Soil Problems Galleries Resources
	>>Home > Brown Patch Read: How to spot Brown Patch Brown Patch (also called Rhizoctonia blight) is a disease most common to Bermuda, Kentucky Bluegrass, Centipede Grass, Bentgrass, St. Augustine, and ryegrasses in regions with high humidity and/or shade. Brown patch commonly starts as a small spot and can quickly spread outwards in a circular or horseshoe pattern up to a couple of feet wide. Often times, while expanding outwards, the inside of the circle will recover, leaving the brown areas resembling a smoke-ring. Brown patch can temporarily harm a lawn's appearance and cause permanent loss of grass plants that are less than 1 year old. Brown patch is a fungal disease that presents a serious threat to St. Augustine each spring and fall. With the onset of cooler temperatures, wet and overcast conditions, brown patch presents a challenge to St. Augustine lawns. Conditions most favorable for brown patch development include (1) the presence of active fungi, (2) vigorous growth of a susceptible grass, (3) daytime temperatures ranging between 75 — 85, (4) the presence of free moisture on the foliage, and (5) night temperatures falling below 68. Symptoms On warm season turf grasses, the disease is characterized by at least two different types of symptoms. The most common is a circular pattern of brown grass with a yellowish ring (smoke ring) of wilted grass on the perimeter of the diseased area. The leaves can be easily pulled from the stolons with the smoke ring because the fungus destroys the tissue at the base of the leaf. Symptoms first appear as small circular patches of water-soaked, dark grass that soon wilt and turn light brown. Stolons often remain green as the disease develops, the circular patches enlarge, smoke-rings become apparent and new green leaves may emerge in the center of the circular areas. Control When environmental conditions are favorable, brown patch is likely to develop on susceptible turf grasses. The severity of the disease can be somewhat controlled by following a strict fertilization schedule that only apply the proper amount of nitrogen and trace elements during the ideal times; by watering early in the morning to remove dew and all the grass to dry quickly; mow grass a little taller with a sharp mower blade, and when possible, by bagging the lawn clippings during likely periods of disease activity. Fungicide applications are most effective when used as a preventative before the disease has become established in the lawn. Prevention The best prevention for brown patch is to aerate often, reduce shade to effected areas, and follow a fertilization schedule to help prevent fertilization with excess amounts of nitrogen. Treatment The most common fungicides used on Brown Patch are: benomyl, chlorothalonil and Armada fungicide (a professionally applied product). Brown patch controls with fungicides containing thiophanate-methyl and/or chlorothalonil become ineffective as temperatures exceed 90°F. Other fungicides containing mancozeb, myclobutanil, propiconazole, quintozene, thiram, or triadimefon may also be used.

	©2012 Landscape-America.com. All Rights Reserved \| Site developed by OHCPi Site Map \| Pro Search Submission Form \| American-Lawns.com \| FAQ \| Resources

Working with problem areas

Enter your ZipCode below to find a professional in your area.

Brown Patch

Symptoms

Control

Prevention

Treatment