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.
1 Melasma can be triggered by birth control pills because it increases hormones throughout the body. # 2  This is one of the most common causes of melasma. 3  Pregnancy: During pregnancy the body will become very hormonal and skin conditions like acne vulgaris and melasma/chloasma become very common.
Melasma is a common skin condition in which brown patches appear on the skin. Melasma often affects the skin on the face. The patches tend to appear on the cheeks, forehead, nose or upper lip. Melasma can also develop on the forearms and neck. No, but it can severely affect your appearance and the way you feel about it.