Dollar Spot Disease
Dollar Spot Lawn Disease is a fungal lawn disease that appears most often as multiple small brown patches which are usually the size of a dollar coin but can be between 1 to 4 inches in diameter. In some instances, the disease will be less clearly seen in the familiar circle patterns, and will instead appear as though it is discoloring or damaging a far larger area of turf.
Identifying Dollar Spot
As mentioned, the easiest way to identify Dollar spot is by its circle-shaped legions, but when it spreads it's identification can be far more difficult. The easiest way to identify the disease at these times is to look at the damage on the blades of the leaf. Dollar Spot is most easily recognizable by its hourglass shaped brown damage on its leaf.
Fine white threads can also be seen early in the morning while there is still moisture on the lawn, these can often be mistaken for spider webs, or mites webs, however, they are simply the result of the fungal infestation. These threads will disappear as the day warms up and the moisture on the lawn dissipates.
Turf Grasses Affected
Dollar Spot will infect almost all turf grasses, it is most evident on Ryegrass, Bermuda Grass, Fescues, Annual Bluegrass, and Bentgrass. The main pre-requisites for the infestation are low Nitrogen levels in the soil, excessive leaf dampness, and lawns which are cut too short.
Treating Dollar Spot Disease can be achieved by using a fungicide treatment that will be available for purchase at your nearest gardening store, and following the manufacturer's recommendations for application. Dollar spot can also be effectively treated by beginning a high Nitrogen fertilizer routine for the treatment period, changing watering regimes, and aerating the sod.
Prevention of Dollar Spot
Dollar Spot Disease is most often prevalent in lawns which are poorly drained or watered wrongly which results in dampness staying on the lawn leaf for too long, the other main factor which promotes Dollar Spot Lawn Disease is a lack of Nitrogen in the soil.
Follow the Golden Rules of Watering and water only in the morning, and aim to water more deeply and less frequently. Also, begin aerating the turf more often or start it as a regime in your lawn care. The next major factor in preventing Dollar Spot is to always follow a regular fertilizing regime, which not only lifts the level of Nitrogen in the soil (which prevents Dollar Spot) but also increases the overall health of the lawn which can in then more easily fight off any initial infection of the disease before it becomes entrenched.