| dc.description.abstract | Arif Imam Sembiring. Spread of Fusarium Wilt Disease
(Fusarium oxysporum f.sp.cubense) on Banana Plants in Langkat Regency.
Supervised by Irda Safni
Fusarium wilt (Fusarium oxysporum f.sp. cubense) is one of the main
diseases threatening banana production in Langkat Regency. This disease attacks
the vascular system of the plant, causing disruption of water and nutrient
transportation, which leads to the death of the plant. This study aims to determine
the distribution of Fusarium wilt disease, the incidence rate, prevalence, and
characteristics of the fungus that causes it. The research was conducted using a
survey method in 12 locations in four sub-districts, namely Batang Serangan,
Sawit Seberang, Padang Tualang, and Secanggang. Samples were collected using
purposive sampling technique, then isolated and identified in the laboratory. The
results showed that the highest disease incidence was found in Tanjung Putus
Village, Padang Tualang Subdistrict (42%), while the lowest was in Kepala
Sungai Village, Secanggang Subdistrict (10%). The average disease prevalence in
all locations was 8.09%. Identification of the fungus showed changes in colony
color and size as it grew, from white in the early phase to purplish pink in the late
phase with increased sporulation. The fungus has curved macroconidia for
dispersal, small microconidia for rapid infection, as well as thick-walled
chlamydospores that allow survival in soil under extreme conditions. | en_US |
