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 also referred to as The Mask of Pregnancy, and Chloasma. The condition generally appears in women between the ages of 20 and 50 (though one in 20 patients are men), and although it isnât harmful, it can cause embarrassment and distress. Melasma can be treated via a number of different methods. Symptoms Melasma appears as either large, flat, irregular patches on various parts of your face, or freckle-sized spots that are called macules.