Is there any control for Phytophthora root rot disease?
The recommended control is the use of fruit fly bait sprays, which are mixtures of an insecticide, an attractant (yeast autolysate) and water. The mixture is sprayed low down on the foliage of trees as a coarse spray of about 50 mL per tree. Registered insecticides for the bait sprays are chlorpyrifos, maldison (Hy-Mal) and trichlorfon (Dipterex). Trichlorfon bait spray is not recommended at times of high fruit fly pressure. For multiple cropping varieties such as Meyer and Lisbon lemons, bait spraying is recommended all year round. For early varieties (e.g. Navel, Imperial), bait spraying should start in January; for mid season varieties (e.g. Ellendale, Hickson), in March; and for late season varieties (e.g. Valencia, Murcott), in May.
