Roger, These kind of quetions would best be asked in the Main Thread Conversation where problems are discussed.
Do you have ants present where you plants are located? If you do, get rid of them somehow!
Depending on the size of your plants I would use a five gallon bucket filled with insecticidal soap and dip the plants. Then have another bucket with some fresh clean water. I think that is better than using forced water on such tender plants.
Gary
Perhaps this will be helpful.
http://www.laters.com/insects/aphids.htm