Weed, insect, and disease control may also be required for pastures. A healthy, productive pasture will resist invasion from most poisonous weeds and provide good quality forage. When pastures are overgrazed, horses will eat the grass and legume species down to the soil, which allows weeds to take over.
These include: 1  Daily sunscreen use. 2  Since sunlight is one of the biggest triggers for melasma, daily sunscreen use is non-negotiable to keep it at bay. 3  Choose a sunscreen with broad-spectrum protection with an SPF of 30 or higher. 4  Outdoor hats. 5  Broad-brimmed hats help keep rays off vulnerable parts of the face.
Extreme exposure to sun light from sun baking accounts for some dark spots at later stages in life. Below the age of 20, acne can cause dark spots due to scarring and red marks left by the infection. Melasma: Itâs one of the commonest causes of grayish patches on the face. It mostly affects the forehead, cheeks, or the area between your mouth and nose.