While fescue is often used in lawns across the world, it can also become an annoying weed problem in lawns laid with other types of grass. For example, if a homeowner has bluegrass in their yard, a fescue weed problem would appear as clusters of thicker and taller grass spotted throughout the lawn. If you notice fescue growing as a weed and prefer not to resort to chemicals, you can pull the fescue up by the roots wherever it appears. Note that if the roots are not pulled as well, it could grow back.
Perhaps a more sure-fire means of fescue weed control is applying chemical treatments. The treatment that tends to work best is glyphosate. This should be applied early in the spring when the fescue has turned green but the surrounding grass has not. If the surrounding grass has turned green, you take the chance of killing it as well. After the glyphosate has done its job, you will need to pull up the dead fescue grass and lay down sod of the same type you have in the rest of the yard to cover the bald spot left by the fescue.
Aside from being a popular lawn grass, fescue is also grown in pastures as a feed for livestock. For those who have it in their lawn, irrigation is important for appearances; but for farmers, irrigation is especially important to the fescue feed his animals will eat. In the spring irrigation for fescue feed is not an urgent matter, but in the summer months when temperatures rise, the pasture should receive at least a half inch or so of water every other day. This should be increased if drought conditions become extreme.
Fescue grass has relatively few problems with disease, but one that will crop up from time to time is brown patch disease. As soon as the brown spots are seen across the pasture or lawn, a fungicide should be applied. In general, the best way to prevent fescue disease is to keep it mowed back, keep it watered without overwatering it (this also entails making sure soil drains well), and applying a good fertilizer that is low in nitrogen and safe for livestock.