Disease - Phytophthora Root Rot, Collar RotRate - 5-10 ml/LHow to Apply - Use higher rate under higher disease risk conditions (eg. for trees in heavy clay soil). Apply each year as a preventative foliar spray, in late winter prior to flowering and again in autumn when fruit are approaching maturity. Spray until leaves are just wet.Use 5-10mL/L rate for container grown Mandarin trees. Removal of fruit from affected trees will assist recovery.