The significant decrease inclove production in Indonesia is mainly due to the Sumatradisease caused by bacterial Ralstonia syzygii subsp. syzygii. It is necessary to manage the disease broadly based on disease detection in the field and the laboratory. Sumatradisease is caused by the bacterium Ralstonia syzygii . Its only host is the clove tree ( Syzygium aromaticum ). It tends to affect older, larger trees that are at least ten years old and 28 feet (8.5 m.) tall. 112 SumatraDisease of Clove in Indonesia Molecular Analysis of Ralstonia syzygii subsp. syzygii Using PCR with specific primers UGMRss-F/UGMRss-R, a 378-bp DNA fragment specific to the endoglucanase gene of R. syzygii subsp. syzygii was amplified (Fig. Sumatradisease of clove has a distinct pattern of disease expression and distribution in the eld. Seedlings less than 2 years old are rarely aected, with trees over 10 years of age being the rst to show symptoms and the rst to die. Background and Objective: Transmission of Sumatradisease of cloves is known to occur through the insect vectors from sick plants to healthy plants. This research studied the transmission of Ralstonia syzygii subsp. syzygii, the cause of Sumatradisease through the soil. Sumatradisease is one of the most serious diseases of cloves in Indonesia. A range of standard bacteriological tests, monoclonal antibodies and DNA hybridisation studies were used to examine the taxonomic relationship of the Sumatradisease bacterium (SDB)... 1.1. sumatradisease of cloves and the sumatradisease bacterium. 1.1.1. History.Sumatradiseaseincloves induced by a xylem-limited bacterium following mechanical inoculation. Plant Pathology 36, 154-163. The epidemiology of Sumatradisease (SD) of cloves is consistent with transmission by an airborne vector. Several diseases and pests can plague clove trees. Perhaps the most serious is Sumatradisease, a bacterial infection that causes the trees to begin to die from the top down. While there is no cure for the disease, its progression can be slowed by an injection of the antibiotic oxytetracycline. Abstract : Ralstonia syzygii is causes Sumatradisease of clove plants. The existence of this pathogen has been reported there in several areas, but has not been much research report related to this issue.
