Identification and disease severity of dieback disease on sengon seedlings in Persemaian Permanen Dramaga Bogor

Abstract

Sengon is one of the forestry plant commodities favoured by the community. So that the provision of healthy seedlings in the nursery is significant to achieve successful planting. However, sengon is very susceptible to several diseases. One of the diseases is dieback in the nursery. This study aims to calculate the incidence and severity of shoot death in sengon seedlings in Persemaian Permanen Dramaga Bogor and identify the types of pathogens that cause dieback in sengon seedlings. Methods of data collection were carried out using the census and scoring methods. In addition, the identification process was carried out under a light microscope with a magnification of 40×10. Data analysis was performed using descriptive analysis. The percentage of disease incidence and dieback severity in sengon seedlings were 10.809% and 73.764%, where the severity of the disease is declared as severe. Based on the identification results, the fungus Rhizoctonia sp. is suspect as the cause of dieback in sengon seedlings.