Turfgrass
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Fairy ring is an umbrella term for a disease that can be caused by more than 60 different species of basidiomycete fungi. It is particularly damaging on golf greens, but can affect all turf species in Georgia. Infection leads to localized dry spots and nutrient imbalances. No single strategy guarantees complete control, but integrating thatch reduction, water management, fertility optimization, and targeted fungicide applications can significantly mitigate disease impact.
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Hunting billbug, Sphenophorous venatus vestitus (Family: Curculionidae) is an important weevil pest of turfgrass in Georgia. It’s called a “billbug” because of its long snout, or bill, which has small mandibles at the tip. Hunting billbug infestations in turfgrass are not easily detected until the first signs of feeding damage, such as discoloration or irregular patches, appear scattered across the turfgrass. Although hunting billbugs attack all major turfgrass genotypes, damage on zoysia grass cultivars can be particularly serious. In addition to hunting billbug, several other species of billbugs are found in warm-season turfgrass including the lesser billbug, S. minimus, and uneven billbug, S. inaequalis.
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C 1178
Mite Management in Turfgrass
Plant-feeding mites can cause serious damage in turfgrass systems, and drought-stressed turfgrass is particularly prone to mite infestation. Mites are generally active in turfgrasses from spring into fall. They feed on plant sap and, in some cases, also inject toxins into plant tissues or manipulate plant growth, thereby producing characteristic symptoms. Some mites do not directly damage the turfgrass but instead become nuisance pests by moving from the lawn to houses and other buildings. This circular discusses the biology, damage, and management of the various mite species that attack turfgrass.
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Turfgrass is an important component of many landscapes. Research has shown that landscapes support diverse, abundant, and intact bee communities in New York, California, and Ohio. In fact, the abundance and diversity of bees visiting home landscapes have been observed to approach, and even exceed, numbers in nearby natural and/or agricultural systems. If the turfgrass has been treated or is being treated with insecticides, the pollinators can be exposed directly or indirectly to the insecticides on the weeds. This can cause lethal or sublethal effects on these pollinators. The guidelines in this publication will reduce insecticide exposure to pollinators as they seek nectar and pollen from plants around lawns.
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Bermudagrass mite is a microscopic mite species (at or smaller than ~0.2 mm or 0.0078 in.) that only infests and feeds on bermudagrass and has become an increasing problem in Georgia. It can develop into a serious problem on golf courses, athletic fields, sod farms, and both residential and public lawns. Bermudagrass mite infestations can reduce the aesthetic value of the turfgrass, causing thinning and poor grass growth. The size of bermudagrass mites poses a real challenge in identifying and monitoring the population in fields.
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Fall armyworms are native to North America and can destroy lawn grass and other turf. They first reach Georgia in the spring or early summer, and caterpillars are noticeable in turfgrass in early July. The third, fourth, and fifth stages of fall armyworm caterpillars are the destructive stages. The younger stages (first through third larval stages) are tiny and hard to see in the grass. When infested, green turfgrass will gradually turn brown as the caterpillars grow. The damaged turfgrass may appear diseased or like it experienced drought.
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Microdochium puede ser severo tanto en el césped principal como en Poa, Lolium, Festuca pero puede infectar a céspedes de clima cálido si estos tienen un crecimiento activo o están en semi-dormancia. La enfermedad se observa comúnmente en áreas que se han sido resembradas.
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Esta publicación es una guía completa para la identificación y control de enfermedades de los céspedes en Georgia. Enfermedades incluyen: mancha “dólar”; anillos de hada; pudrición radicular “toma-todo”; Mancha parda/Mancha larga por Rhizoctonia Royas; Mancha foliar o decaimiento por Curvularia; quemazón o mancha foliar gris; antracnosis; hongos gelatinosos; y pudrición radicular por Pythium/quemazón por Pythium. La publicación también incluye una guía sistemática para el diagnóstico de enfermedades de céspedes; un clave simplificada para la identificación de enfermedades de céspedes; y el calendario de enfermedades de céspedes en Georgia.
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En el estado de Georgia, la mancha gris afecta primordialmente al césped San Agustín y es particularmente dañino y muy prevalente en áreas costeras del estado. En fescue alto aparece en forma esporádica y se observa anualmente en la región norte del estado (zona del Piedmont). Afectando céspedes estresados por el calor. En la región sur y central de Georgia, la mancha gris es más activa en junio a agosto, sin embargo, en las primaveras que son cálidas, la enfermedad puede presentarse temprano en el año.
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