after the sun passes over...mix up a nice batch of liquid hand soap & 1 qt water & spray...................you might need to spray any other plants near it......wait and see if that works for you....if not
Sevin...from lawn & garden section....read label carefully and wear old long clothes, goggles, mask & gloves.....mix it according to directions..............and spray.........keep children & pets away from this until this is dry.