Cynodon dactylon (L./ Pers.) Is a thermophilous clumsy grass with protuberant protuberances. Wild populations of this species, belonging to the so-called C4 grass, occur mainly in the southern hemisphere. Somewhere it is referred to as a strongly invasive species. It also occurs in a number of places in the Czech Republic, especially in the Dyjskosvratecký and Dolnomoravské valleys. It is not soil intensive, it occurs both in light, sandy localities and in soils deep and well supplied with nutrients. It can be used both for forage and especially for lawn purposes.

In the Czech Republic, its use is only marginal. Its advantage is high resistance to high air temperatures and water scarcity, but also low tolerance to shading and low temperatures. In the future, however, due to the weather in recent years, it may be a species useful for grassing the dry, less fertile areas of South Moravia. It is also possible that, in addition to the commonly used zoysia (Zoysia sp.), It will also find greater use in our lawns. In my study of grasslands, especially lawns on the Adriatic coast in the vicinity of Poreč on the Istrian peninsula in June 2018, I came across very nice and well-kept lawns (composed mostly of perennial ryegrass and red fescue) and probably spontaneous grassing of sandy and rocky areas. Flowering plants, however, showed a strong attack on the swelling. Individual spikelets were twisted, covered with brown to black meat spores). Upon my return home, I identified this viciousness as Ustilago cynodontis (Pass.) Henn. Disputes of this vigor are spherical in shape. This disease has not been described in our territory yet. This disease significantly prevents seed formation, reduces the growth of stolons, and reduces dry matter yield in wreckage (Garcia-Guzmán and Burdon, 1997). This finding is very important since both breeding and commercial exploitation of wreckage are used with both generative seed seeds and stolons. The occurrence of this disease in the northern areas is also reported by the finding of blisteriness from the US state of Washington (Kam Sun Dung et al., 2013). Although the brilliance of wreckage has not yet been found in our territory, it may pose some danger in the future. It can be a problem not only in the grassing of imported carpet from the wreckage, but also in the greening of arid sites with this species or in the process of breeding new varieties adapted to our conditions. Author: doc. Ing. Bohumir Cagas, CSc., GREEN 2/2019
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