Red Spider Mites
I planted some impatiens and petunias under a couple of trees and BOOM, the next day, they were ALL loaded with red spider mites .
What's the best treatment for them?
From another post.
Dish soap and water will work maybe a teaspoon per mister bottle.
another is to soak a whole clove of crushed garlic in three cups of water for two days then add either soap flakes a half cup or just shave up a half a bar of regular soap shake it up untill the soap is dissolved and strain mix this one to one with water and chill the unused portion.
For non food plants such as perennials shrubs or trees soak 1 lb of crushed or chooped ruhbarb leaves ( they are poisnous so no drinking the water ) for 30 minutes dilute with another gallon of water and spray onto foliage.