The rubber tree is the only commercial source of natural rubber. Its cultivation can be severely limited by pathogenic diseases such as the Fusicoccum leaf fall disease.
An outbreak of the disease was first recorded in 1987 in south Peninsular Malaysia. In Indonesia, the disease first occurred in 2016 in North Sumatra and has now spread to southern Sumatra from the end of 2017. Areas in South Kalimantan, Java, Lampung and Central Sulawesi have also been said to be affected.
Fusicoccum attacks all natural rubber clones and has affected more than 22,000 hectares of rubber plantations till date. Diagnosis of the disease is no easy task, as the onset of visible symptoms are not evident until after some time.
The Fusicoccum leaf fall disease is caused by the fungus of Neofusicoccum ribis. Disease symptoms typically appear only aft...
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