There is no one universal answer, organic or otherwise. One solution might be a change in the overall culture. Lots of problems happen because of high humidity from watering. Maybe you can change to drip irrigation, a method that will change the humidity at plant level. Or, change your watering schedule to early in the day so foliage will be dry before dark.
Plants react to that situation with stress and stress attracts many pests.
Next week, we'll cover some specific solutions and look at introducing friendly insects into your garden. Good luck and great gardening. David Soper, The Garden Guy, writes and lectures on gardening topics. There's even a free weekly email newsletter. All rights reserved unless specifically noted.