Vitax Winter Tree Wash 500mlWinter Tree Wash is a blend of natural plant and fish oils for control of insect and aphid eggs on fruit trees and bushes during the dormant season. Suitable for organic gardening, it can be used on both edible and ornamental crops. Winter Tree Wash: Removes insect debris, dust and wax which insects can use to secure their eggs onto the plant or tree Clears the plant of eggs, larvae an nymphs of aphids and insects Works purely by physical means.