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Cocoa is one of the plantation commodities that have high economic value among other plantation crops and plays an important role as a source of foreign exchange through export and encourages regional economics, especially in rural areas. To increase the production of cocoa crops in Betung Village, Kumpeh Ilir District, it is necessary to know the condition of cocoa plants that have the disease and what percentage of the disease attack. It is useful to perform disease control techniques on cocoa plants. This study aims to find out about Vascular Streak Dieback Disease and how many percentages of attacks Vascular Streak Dieback disease. The research was done by Simple Random Sampling method. Crop sampling was done randomly at smallholder cocoa plantations in The Betung Kabupaten Muaro Jambi . Then collect the data by counting all the plants both healthy and sick to get the percentage of plants attacked by using the formula P = n / N x 100%. The sample of the cocoa plant affected by Vascular Streak Dieback disease was identified in the Unbari Basic Laboratory. The result showed that there were the attackingof foul fruit disease caused by a Oncobasidium theobromae fungus on passing in land was 80 % which was means it was hard level of disease as more than half cocoafruit were foul. While it showed a light of disease attacking on unpassing in land it’s only 30 %.

PENYAKIT Vascular Streak Dieback (VSD ) PADA TANAMAN KAKAO (Theobroma cacao, L. ) SERTA PERSENTASE SERANGANNYA