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据马来西亚1976年国际农业、油棕会议文集报道,在深厚泥炭土植区栽植的油棕,普遍出现褪绿症状,继之幼叶大大缩短进而坏死。在用含铜200ppm的硫酸铜反复喷叶后4—6周,病株能完全复原。在每株油棕根部土中施用硫酸铜0.225和0.45公斤,能减轻树冠中部的褪绿症状,但见效较慢。6—7年的病株,在根颈施药后3—4个月或土壤施药后5—6个月才能见效。病株复原后,早期产量与同一地区的健株并无差异。
According to the Malaysia International Symposium on Agriculture, Oil and Palm, 1976, oil palm planted in deep peat planting areas generally shows symptoms of chlorosis, followed by young leaves which are greatly shortened and necrotic. Four to six weeks after spraying the leaves with copper sulfate containing 200 ppm of copper sulfate, the diseased plants were completely restored. Applying 0.225 and 0.45 kg of copper sulfate per root of oil palm can relieve the symptoms of chlorosis in the middle of the canopy, but the effect is slow. Six to seven years of diseased plants can be effective 3-4 months after root application or 5-6 months after soil application. After the recovery of diseased plants, there was no difference between the early yield and the healthy plants in the same area.