Caused by Phytophthora species. Prevention is by use of healthy nursery stock grafted on citrus species resistant to the fungus, high planting of trees and fumigation of planting sites in land previously in citrus. Planting sites should be well drained. Caused by Cephaleuros virescens . Infects leaves and bark, and can cause girdling of branches.
Control is by copper sprays.
Control is by timely spray application of miticides. Various species may develop damaging infestations on bark, leaves or fruit. Control with sprays of scalicides and oil. For more information see Fact Sheet ENY-814, Scale Pests of Florida Citrus . Can be occasionally troublesome in southern Florida.