you need to spray them down with Neem oil or Dawn dishsoap or a mix of both. about 1 tablespoon each per gallon, i like about 1 Tbls. of neem and about 3/4 Tbls. of dishsoap together. you have to spray the whole plant down starting with the underside of the leaves(where the EGGS are) at the base and make sure you get evereywhere. You can get a large or small bucket depending on how big your plant are and turn them upside down to submerge them for a couple minutes also.
another way is AppleJuice CONCENTRATE. i read where an old grower said to use AJ concentrate so i tried it, 1 application was all i needed. It doesnt hurt the flavor of the weed(used 3 weeks before harvest) but it does make the plant extra sticky so everything wants to stick(dust, flies, leaves) ants did show but were more interested in the soil than anything. Next time i use AJ , i will mix it 1 to 1 with water. Try it on 1 , youll see.