Space plants, heat, and ventilate to maintain low humidity. Phytophthora Root Rot and Top Dieback Plants stunted, wilted, and leaves yellow. Roots, with few feeder roots die. Stem wood at the soil level has red-brown discoloration. In top dieback phase, leaves have dark brown spots .
Shoots die from the tips back with dark brown cankers forming.
Pot and propagate in pasteurized media. Use clean, disinfested tools. Discard infected plants. Use composted tree bark as the potting mix. Avoid overhead watering.