Oxalis, also known as yellow wood sorrel, is a delicate ground cover that gardeners love to hate, as it's a persistent weed that seems to reappear no matter what you throw at it. Its shamrock-like ...

If the leaves on your houseplants are suddenly yellowing and dropping, or if you've noticed greenish-white or black insects crawling on your houseplants, then there's a good chance you're dealing with ...