I've had success controlling A Lotus with Navigate granular. It's a 2,4-D herbicide, and is a little slower acting than spraying a liquid glyphosate. If the flowers bloom and drop seed heads, then expect random A Lotus popups for several more years.
AFTERTHOUGHT: Navigate ain't cheap. It's roughly $4 a pound. You might want to take a look at other treatments this year that are much cheaper, and should reduce the total acreage that needs Navigate next year. Glyphosates work well, but A Lotus has very waxy leaves, and treatment using a nonionic surfactant is needed.
American Lotus
