An insufficient amount of a specific nutrient will cause deficiency symptoms. Plant nutrition is all about balance. A specific nutrient has to be supplied at a particular level, not only in its own right but also in relation to other nutrients.
wastewater from Palm oil mill cause :
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Basal End Rot
Red Ring Disease
Rhynchophorus palmarum L.
Nematodes (Rhadinaphelenchus cocophilus)These pests attack the roots of oil palm plantations, with symptoms of new leaves that will be rolled open and grow upright. Then the leaves will change color to yellow and dry. Decay occurs in bunches of flowers and does not open, so the plants do not produce oil palm fruit.
The disease is caused by this nematode and transmitted by the American palm weevil, Rhynchophorus palmarum L.