91% iso 50/50 with water sprayed every other day for at least 3 treatments (spray from underside then top side and soak em good) then watch closely for the borg to return. Captain Jacks Dead Bug or Spinosad are also used here, depends on just what it is I am spraying for..
Ladybugs, if you grow outside, you need ladybugs, and other predatory bugs such as praying mantis. These ladies are the best you can get for aphids, they luv them for lunch! 1500 ladybugs is not to expensive. If you have other growers in your area get with them and everybody turns some loose.