The cure is to improve growing conditions, add acidity to the soil, and eliminate diseased material. It is common in Mysore India, and is often attacks rubber trees too. It occurs in Java, Malaya, and the Philippines. However, it has been found in the Congo where there are no rubber plants. It is spotted when the root area has mycelium threads of yellowish-white.
Typical nutrients are nitrogen, phosphorous, potash, iron, and boron, etc.
Numerous symptoms from yellowing of the leaves, whitening of the leaves, browning of the leaf, either the whole leaf or just at the tips. Some trace elements if totally devoid in the soil will also cause problems. The cure or prevention is proper fertilization. Proper pH must be maintained by fertilization. These plants can be fried from the sun and get sun burn in a single day if for some reason the atmosphere does not filter the light right.